[Polly] Fix a testcase after LLVM commit r334318

ScalarEvolution has become slightly more intelligent, so obfuscate the
exit condition in the testcase some more to keep it working.


git-svn-id: https://llvm.org/svn/llvm-project/polly/trunk@334327 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed