Fixed typo in CreateProcessTrailingSlash test

--gtest_filter was filtering an invalid name for the test.

Differential Revision: http://llvm-reviews.chandlerc.com/D1733


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191100 91177308-0d34-0410-b5e6-96231b3b80d8