[PATCH] Support for saving an ordered list of compilation units

[Kostya Serebryany]

LGTM with two nits.
You don't have commit access, do you? 
I'll commit this and http://reviews.llvm.org/D7702 once we are done.


================
Comment at: lib/sanitizer_common/sanitizer_coverage_libcdep.cc:85
@@ -84,3 +84,3 @@
   void InitializeGuardArray(s32 *guards);
-  void InitializeGuards(s32 *guards, uptr n);
+  void InitializeGuards(s32 *guards, uptr n, const char *mod_name);
   void ReinitializeGuards();
----------------
module_name

================
Comment at: lib/sanitizer_common/sanitizer_coverage_libcdep.cc:113
@@ -112,1 +112,3 @@
 
+  // Vector of module (compilation unit) names
+  InternalMmapVectorNoCtor<const char*> comp_unit_name_vec;
----------------
period at the end.

http://reviews.llvm.org/D7703

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