supersize: Strip linker-added prefixes from symbol names

tools/binary_size/libsupersize/testdata/Console.golden

 # Show pydoc for main types:
 import models
 help(models)
 
 # Show all attributes of all symbols & per-section totals:
 Print(size_info, verbose=True)
 
 # Show two levels of .text, grouped by first two subdirectories
 text_syms = size_info.symbols.WhereInSection("t")
 by_path = text_syms.GroupBySourcePath(depth=2)
@@ skipping 28 matching lines @@
 Number of object files: 10
 
 First columns are: running total, type, size
  2641394 r@Group      2641394 {no path}
              ** merge strings (count=2)
  2651152 t@Group      9758    {no path}
              ** symbol gaps (count=2)
  2651600 t@0x28f000   448     third_party/icu/ucnv_ext.c
              ucnv_extMatchFromU
  2651752 d@0x2de7008  152     third_party/container.c
-             rel._ZN4base7androidL22kBaseRegisteredMethodsE
+             base::android::kBaseRegisteredMethods
  2651846 t@0x2a1000   94      third_party/container.c
              blink::PaintChunker::releasePaintChunks [clone .part.1]
  2651902 d@0x2c176f0  56      third_party/icu/ucnv_ext.c
              ChromeMainDelegate [vtable]
  2651958 d@0x2cd8500  56      third_party/paint.cc
              ChromeMainDelegateAndroid [vtable]
  2652014 t@0x28d910   56      base/page_allocator.cc
-             startup._GLOBAL__sub_I_bbr_sender.cc
+             _GLOBAL__sub_I_bbr_sender.cc
  2652069 r@0x28f3450  55      third_party/paint.cc
              kAnimationFrameTimeHistogramClassPath
  2652113 r@0x284e370  44      base/page_allocator.cc
              Name
  2652151 t@0x28d964   38      base/page_allocator.cc
              extFromUUseMapping
  2652183 r@0x284e398  32      third_party/container.c
              chrome::mojom::FilePatcher::Name_
  2652215 t@0x28d98a   32      base/page_allocator.cc
              extFromUUseMapping
- 2652243 t@0x2a0020   28      third_party/container.c
+ 2652243 t@0x28f1c8   28      third_party/icu/ucnv_ext.c
+             _GLOBAL__sub_I_SkDeviceProfile.cpp
+ 2652271 t@0x28d948   28      base/page_allocator.cc
+             _GLOBAL__sub_I_pacing_sender.cc
+ 2652299 t@0x2a0020   28      third_party/container.c
              blink::ContiguousContainerBase::ContiguousContainerBase
- 2652271 t@0x28f1c8   28      third_party/icu/ucnv_ext.c
-             startup._GLOBAL__sub_I_SkDeviceProfile.cpp
- 2652299 t@0x28d948   28      base/page_allocator.cc
-             startup._GLOBAL__sub_I_pacing_sender.cc
  2652323 d@0x2c17740  24      third_party/container.c
              chrome::mojom::FieldTrialRecorderProxy [vtable]
  2652347 d@0x2c17728  24      third_party/icu/ucnv_ext.c
              chrome::mojom::FieldTrialRecorderRequestValidator [vtable]
- 2652371 d@0x2cd8538  24      base/page_allocator.cc
+ 2652371 t@0x28f1e0   24      third_party/icu/ucnv_ext.c
+             foo_bar
+ 2652395 d@0x2cd8538  24      base/page_allocator.cc
              mojo::MessageReceiver [vtable]
- 2652395 t@0x28f1e0   24      third_party/icu/ucnv_ext.c
-             startup._GLOBAL__sub_I_SkDiscardableMemoryPool.cpp
  2652411 d@0x2cd84e0  16      third_party/gvr-android-sdk/libgvr_shim_static_arm.a/libcontroller_api_impl.a_controller_api_impl.o
              .Lswitch.table.45
- 2652427 t@0x2a0000   16      third_party/paint.cc
+ 2652427 t@0x28d900   16      base/page_allocator.cc
+             _GLOBAL__sub_I_page_allocator.cc
+ 2652443 t@0x2a0000   16      third_party/paint.cc
              blink::ContiguousContainerBase::shrinkToFit
- 2652443 t@0x28d900   16      base/page_allocator.cc
-             startup._GLOBAL__sub_I_page_allocator.cc
  2652455 t@0x2a0010   12      third_party/paint.cc
              blink::ContiguousContainerBase::shrinkToFit [clone .part.1234] [clone .isra.2]
  2652467 d@0x2cd8550  12      base/page_allocator.cc
              kMethodsAnimationFrameTimeHistogram
  2652478 r@0x284e364  11      base/page_allocator.cc
  2652486 d@0x2cd84f0  8       third_party/gvr-android-sdk/libgvr_shim_static_arm.a/libport_android_jni.a_jni_utils.o
              kSystemClassPrefixes
- 2652490 d@0x2de70a0  4       third_party/container.c
+ 2652490 d@0x2de70a4  4       third_party/container.c
+             base::android::g_library_version_number
+ 2652494 d@0x2de70a0  4       third_party/container.c
              base::android::g_renderer_histogram_code
- 2652494 r@0x28f3480  4       third_party/paint.cc
+ 2652498 r@0x28f3480  4       third_party/paint.cc
              blink::CSSValueKeywordsHash::findValueImpl::value_word_list
- 2652498 d@0x2de7000  4       base/page_allocator.cc
+ 2652502 d@0x2de7000  4       base/page_allocator.cc
              google::protobuf::internal::pLinuxKernelCmpxchg
- 2652502 d@0x2de7004  4       third_party/container.c
+ 2652506 d@0x2de7004  4       third_party/container.c
              google::protobuf::internal::pLinuxKernelMemoryBarrier
- 2652506 d@0x2de70a4  4       third_party/container.c
-             rel.local._ZN4base7android12_GLOBAL__N_124g_library_version_numberE
  2652506 b@0x0        262144  third_party/fft_float.cc
              ff_cos_131072
  2652506 b@0x0        131072  third_party/fft_fixed.cc
              ff_cos_131072_fixed
  2652506 b@0x0        131072  third_party/fft_float.cc
              ff_cos_65536
  2652506 b@0x2dffe80  200     third_party/icu/ucnv_ext.c
              SaveHistogram::atomic_histogram_pointer
  2652506 b@0x2dffda0  28      third_party/icu/ucnv_ext.c
              g_chrome_content_browser_client
  2652506 b@0x2dffe84  4       third_party/icu/ucnv_ext.c
              g_AnimationFrameTimeHistogram_clazz