[sanitizer] Restore __thumb__ workaround
authorVitaly Buka <vitalybuka@google.com>
Wed, 8 Dec 2021 01:59:39 +0000 (17:59 -0800)
committerVitaly Buka <vitalybuka@google.com>
Wed, 8 Dec 2021 02:04:06 +0000 (18:04 -0800)
commit5ff52be5d98a621db6de079ad09d0f94854938e8
tree36a418ba4ce1f8c19691c261df6e9dada6719c96
parentee0908703d2917d7310b71c5078fef44e8270317
[sanitizer] Restore __thumb__ workaround

It was removed in D114934 and failed clang-thumbv7-full-2stage.
compiler-rt/lib/sanitizer_common/sanitizer_allocator.cpp
compiler-rt/lib/sanitizer_common/sanitizer_common.h
compiler-rt/lib/sanitizer_common/sanitizer_common_libcdep.cpp