supersize: Move [clone] from name -> flags & rewrite Cluster()

tools/binary_size/libsupersize/testdata/Archive_Elf.golden

Index: tools/binary_size/libsupersize/testdata/Archive_Elf.golden
diff --git a/tools/binary_size/libsupersize/testdata/Archive_Elf.golden b/tools/binary_size/libsupersize/testdata/Archive_Elf.golden
index 6bc13f46ee3b78192963ce2a32da5447b4ea0abe..420ccb2dfb3916c8872c7b1ab45364e29aa149d8 100644
--- a/tools/binary_size/libsupersize/testdata/Archive_Elf.golden
+++ b/tools/binary_size/libsupersize/testdata/Archive_Elf.golden
@@ -33,12 +33,12 @@ Section t: has 100.0% of 35900712 bytes accounted for from 18 symbols. 0 bytes a
 .text@28f1e0(size_without_padding=69120,padding=4,full_name=foo_bar,object_path=third_party/icu/icuuc/ucnv_ext.o,source_path=third_party/icu/ucnv_ext.c,flags={unlikely,gen})
 .text@2a0000(size_without_padding=16,padding=32,full_name=blink::ContiguousContainerBase::shrinkToFit(),object_path=,source_path=,flags={2 aliases})
 .text@2a0000(size_without_padding=16,padding=32,full_name=BazAlias(bool),object_path=third_party/icu/icuuc/ucnv_ext.o,source_path=third_party/icu/ucnv_ext.c,flags={gen,2 aliases})
-.text@2a0010(size_without_padding=12,padding=0,full_name=blink::ContiguousContainerBase::shrinkToFit() [clone .part.1234] [clone .isra.2],object_path=third_party/{shared}/2,source_path=third_party/{shared}/2,flags={3 aliases})
+.text@2a0010(size_without_padding=12,padding=0,full_name=blink::ContiguousContainerBase::shrinkToFit(),object_path=third_party/{shared}/2,source_path=third_party/{shared}/2,flags={clone,3 aliases})
 .text@2a0010(size_without_padding=12,padding=0,full_name=FooAlias(),object_path=third_party/ffmpeg/libffmpeg_internal.a/fft_float.o,source_path=third_party/fft_float.cc,flags={3 aliases})
 .text@2a0010(size_without_padding=12,padding=0,full_name=BarAlias(),object_path=third_party/ffmpeg/libffmpeg_internal.a/fft_float.o,source_path=third_party/fft_float.cc,flags={3 aliases})
 .text@2a0020(size_without_padding=24,padding=4,full_name=blink::ContiguousContainerBase::ContiguousContainerBase(blink::ContiguousContainerBase&&),object_path=third_party/WebKit.a/ContiguousContainer.o,source_path=third_party/container.c,flags={})
 .text@2a1000(size_without_padding=0,padding=4040,full_name=** symbol gap 1,object_path=,source_path=,flags={})
-.text@2a1000(size_without_padding=94,padding=0,full_name=blink::PaintChunker::releasePaintChunks() [clone .part.1],object_path=third_party/WebKit.a/ContiguousContainer.o,source_path=third_party/container.c,flags={anon})
+.text@2a1000(size_without_padding=94,padding=0,full_name=blink::PaintChunker::releasePaintChunks(),object_path=third_party/WebKit.a/ContiguousContainer.o,source_path=third_party/container.c,flags={anon,clone})
 .text@24ca628(size_without_padding=0,padding=35821002,full_name=** symbol gap 2 (end of section),object_path=,source_path=,flags={})
 .rodata@266e600(size_without_padding=1961984,padding=0,full_name=** merge strings,object_path=,source_path=,flags={})
 .rodata@284d600(size_without_padding=3425,padding=0,full_name=** merge constants,object_path=,source_path=,flags={})