Fix variables.test after D49018

Summary: This one fixes variables.test after D49018. The test was broken because D49018 adds a location information to variables, but I hadn't noticed that, because I used 32-bit build to run tests, so the test looked to me already broken before that commit (the test relies on mangled names, but the mangling schemes are different for 32-bit and 64-bit).

Reviewers: stella.stamenova, lldb-commits

Reviewed By: stella.stamenova

Patch By: Aleksandr Urakov

Differential Revision: https://reviews.llvm.org/D49475

llvm-svn: 337397