libsanitizer: merge from upstream (3185e47b5a8444e9fd).

libsanitizer/MERGE

libsanitizer/asan/asan_allocator.cpp

libsanitizer/asan/asan_allocator.h

libsanitizer/asan/asan_errors.cpp

libsanitizer/asan/asan_errors.h

libsanitizer/asan/asan_globals.cpp

libsanitizer/asan/asan_interceptors.cpp

libsanitizer/asan/asan_interceptors.h

libsanitizer/asan/asan_internal.h

libsanitizer/asan/asan_linux.cpp

libsanitizer/asan/asan_mac.cpp

libsanitizer/asan/asan_malloc_win.cpp

libsanitizer/asan/asan_mapping.h

libsanitizer/asan/asan_memory_profile.cpp

libsanitizer/asan/asan_poisoning.cpp

libsanitizer/asan/asan_report.cpp

libsanitizer/asan/asan_report.h

libsanitizer/asan/asan_thread.cpp

libsanitizer/asan/asan_win.cpp

libsanitizer/builtins/assembly.h