Change the available features used for no-rtti and no-exceptions
Change the available features used for no-rtti and no-exceptions

git-svn-id: 756ef344af921d95d562d9e9f9389127a89a6314@227107 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/libcxx,llvm-mirror/libcxx,llvm-mirror/libcxx,llvm-mirror/libcxx,llvm-mirror/libcxx