Revert r224149, llvm-dsymutil was already here.

I saw a failure on an internal bot, opened this file, saw it was missing,
thought "aha!", tried to land, got an "file is out of date", synced, didn't see
the file listed right above the line I added (cause I didn't add it in the
right place) and landed. Apologies!

llvm-svn: 224152