The flag was added because Apple clang and Chromium clang disagreed
for certain versions of instructions.

qsubaddx, qaddsubx, ldrneb and ldrneh were used in armv6 assembly
which was removed in d55724fa

vqshrun was used in some neon assembly but superseded by
dcbfacbb

.include was used for obj_int_extract/asm_offsets and removed in
6eec73a7

Change-Id: I32f4c9b536d0318482101c0b8e91e42b8f545f18