add a comment explaining why darwin/i386 uses ## as a comment.
It's not clear why this is really required, but it was explicitly
added in r48808 with no real explanation or rdar #.

llvm-svn: 96438
1 file changed
tree: 4ab2b8852481c8ad3e4a3b9d0a180246d1d0a718
  1. clang/
  2. compiler-rt/
  3. llvm/