Make test robust to changes in prefix/avoid hardcoded line numbers
Make test robust to changes in prefix/avoid hardcoded line numbers

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@309516 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit 429be9362d598d3b7b3ea6e19b1be2dca867aa0a)

apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm