Clang supports specific CPU targeting and optimization
for Kryo.
This switches us to using the specific Kryo targeting
when Clang is used. For other compilers, we fallback
to cortex-a57 targeting.
Also, move the replaceFirst function to a shared location.
Bug: 36728278
Test: Built and booted sailfish, ran bionic unit tests and art tests.
Test: Disassembled libc.so before this change and after and looked at
Test: the differences. Mostly the results were the order of instructions
Test: changing.
Test: Verified with the clang person (srhines) that our clang has this support
Test: and that it appears to be mostly instruction scheduling changes.
Change-Id: I4ee73d8bcc1e4f5eccb162c18937811fe199b16f
Signed-off-by: Alex Naidis <alex.naidis@linux.com>
5df73d02ce