Rename the autogenerated garbage collector headers, so they are not confused
with ordinary header files.


git-svn-id: https://llvm.org/svn/llvm-project/dragonegg/trunk@173442 91177308-0d34-0410-b5e6-96231b3b80d8
Forgot to commit the Makefile changes.


git-svn-id: https://llvm.org/svn/llvm-project/dragonegg/trunk@173444 91177308-0d34-0410-b5e6-96231b3b80d8