[PATCH] [UBSAN] Suppress an error report with given type information

[Byoungyoung Lee]

Resolved comments by Alexey. Please note this patch does NOT pass ubsan testcases, but I'm uploading this to ask why it fails.

The failing test is 

Failing Tests (1):
    UndefinedBehaviorSanitizer-AddressSanitizer :: TestCases/TypeCheck/vptr.cpp

with CHECK-LOC-SUPPRESS check. I've checked this case manually, and everything looks fine. But not sure why cmake test complains this specific case went wrong (only for UBSAN+ASAN).

http://reviews.llvm.org/D4702

Files:
  lib/sanitizer_common/sanitizer_suppressions.cc
  lib/sanitizer_common/sanitizer_suppressions.h
  lib/sanitizer_common/tests/sanitizer_suppressions_test.cc
  lib/ubsan/ubsan_diag.cc
  lib/ubsan/ubsan_diag.h
  lib/ubsan/ubsan_flags.cc
  lib/ubsan/ubsan_handlers_cxx.cc
  lib/ubsan/ubsan_init.cc
  test/ubsan/TestCases/TypeCheck/vptr.cpp
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