[test-suite] Fix uninitialized memory use in PathFinder

We need to use the allocation function here with actually initializes the
structure.

Thanks to Adrian Prantl for pointing out the problem (because it was causing
non-deterministic buildbot failures).

git-svn-id: https://llvm.org/svn/llvm-project/test-suite/trunk@311689 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed