Revert "Re-apply "Introduce FuzzMutate library""

The dependencies for the new library seem to be misconfigured on some
linux configs:

  http://bb.pgr.jp/builders/llvm-i686-linux-RA/builds/5435/steps/build_all/logs/stdio

This reverts r311392.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@311393 91177308-0d34-0410-b5e6-96231b3b80d8
16 files changed