Clean up in buildbot directories.

This test created a statements.ll file until about a month ago. Some buildbots
still have this file in their source dir. This is the easiest way to remove the
file on all bots. Then I'll revert.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@113814 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed