- Remove an -O3 flag from a couple of clang x86 codegen tests so the
tests do not need to be updated when optimizations in LLVM change.
- Change the tests to use utils/update_cc_test_checks.sh
- Change from apple/darwin triples to generic x86_64-- and
i386-- because it was not relevant to the test but
`update_cc_test_checks` seems to be unable to handle platforms that
prepend `_` to function names.
There are still plenty of tests that specify x86 as a triple but most shouldn't be doing anything very target specific - we can move any ones that I have missed on a case by case basis.
