Fix test cl-response-file.c to work on all platforms including Windows/Solaris.
Fix test cl-response-file.c to work on all platforms including Windows/Solaris.

Differential Revision: https://reviews.llvm.org/D63678

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@364245 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang