[PATCH] [Msan] Generalize mapping facilities to add FreeBSD support

[Viktor Kutuzov]

Updated.
* Fixed the #if condition for the case of __mips64.
* SHADOW_TO_ORIGIN() moved out from the platform-specific sections.
* InitShadow replaced with __msan_init in the diagnostic message.
* The calls to TakeMapRange() fixed to check returning values.
* Minor spacing fixes.

http://reviews.llvm.org/D6387

Files:
  lib/msan/msan.cc
  lib/msan/msan.h
  lib/msan/msan_interceptors.cc
  lib/msan/msan_linux.cc
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