[test] Fix test failure

The version mismatch symbol is version 9 on 32 bit android. Since
this test isn't actually testing any android specific functionality,
we force the target triple to x86_64-unknown-unknown in order to have
a consistent version number. It seems the test was already trying to
do this, just not doing it right

Patch by Christopher Tetrault

Differential Revision: https://reviews.llvm.org/D68882

llvm-svn: 374836