Move the feature test macros script to the utils directory.

It doesn't make a lot of sense to keep it with the tests,
deep into the test suite directonies.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@352970 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed