C++: Add support for -fno-use-cxa-atexit.
 - So much typing, so little gain...

Also, rename the __cxx_global_initialization function just to match llvm-gcc.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@99039 91177308-0d34-0410-b5e6-96231b3b80d8
12 files changed