Revert "[-cxx-abi microsoft] Mangle UUIDs correctly, stick them in the proper section"

This commit reverts r188053.

It is breaking the build bots.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@188055 91177308-0d34-0410-b5e6-96231b3b80d8