[libc++abi] Use target_compile_options to pass LIBCXXABI_ADDITIONAL_COMPILE_FLAGS (#96112)
We use target_compile_options to pass the libc++ variant of this flag,
so we should be consistent for libc++abi. This is actually not only a
matter of consistency: target_compile_options handles duplicate CMake
options in a certain way (it removes duplicates but has an escape hatch
using the "SHELL:" prefix), and it is important for both libc++ and
libc++abi options to be handled in the same way.
NOKEYCHECK=True
GitOrigin-RevId: 67da89cf74917050b35fa63441fd25437195f8fc
2 files changed
