Insulate this test from the whims of the random number generator.

Our internal buildbot just failed because the tempfile happened to be named
'nodefaultlib-lcGA7k.o', which contains the substring '-lc'.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170941 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed