Move stripping of debug symbols on linux behind a flag

build/config/compiler/BUILD.gn

Index: build/config/compiler/BUILD.gn
diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index 069f10b98123f4560bee01bcdaaea8cf674e22e3..919a1e28bfc2a18c90a5374d1adb24fcb5b9fa75 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -92,6 +92,10 @@ declare_args() {
   # Optimize for coverage guided fuzzing (balance between speed and number of
   # branches)
   optimize_for_fuzzing = false
+
+  if (is_clang && is_linux) {
+    strip_absolute_paths_from_debug_symbols = false

[brettw, 2017/02/15 22:48:56]

Can you add a comment above this (inside the condition) that explains why
somebody might want to use this?

+  }
 }
 
 if (is_clang && !is_nacl) {
@@ -425,7 +429,7 @@ config("compiler") {
   # clang-cl (used if is_win) doesn't expose this flag.
   # Currently disabled for nacl since its toolchain lacks this flag (too old).
   # TODO(zforman): Once nacl's toolchain is updated, remove check.
-  if (is_clang && is_linux) {
+  if (is_clang && is_linux && strip_absolute_paths_from_debug_symbols) {
     absolute_path = rebase_path("//.")
     cflags += [ "-fdebug-prefix-map=$absolute_path=." ]
   }