Switch to an assembler macro for CFI_RESTORE_STATE_AND_DEF_CFA.

Newer versions of clang reject multiple assembler directives
on the same line, which breaks the preprocessor macro
CFI_RESTORE_STATE_AND_DEF_CFA. Fix it by making it an assembler
macro instead.

Bug: 191980979
Change-Id: I823ff9c66336931249d2bac40280b24ecdebd0cf
7 files changed