[PATCH] Add process name to Asan logfile name and report message

[Yury Gribov]

Something like this seems to work
  +#define DEFINE_LINKER_INITIALIZED_OBJECT(type, name) \
  +  static uptr __ ## name ## _bytes [(sizeof(type) + sizeof(u64) - 1) / sizeof(u64)]; \
  +  static type & name = reinterpret_cast<type &>(__ ## name ## _bytes[0]);
  ...
  -static BlockingMutex binary_name_cache_lock(LINKER_INITIALIZED);
  +DEFINE_LINKER_INITIALIZED_OBJECT(BlockingMutex, binary_name_cache_lock);
   static char binary_name_cache_str[kMaxPathLength];
   static bool binary_name_cache_initialized = false;
Does this approach make sense?

http://reviews.llvm.org/D5724