[CUDA] Don't specify exact line numbers in cuda-builtin-vars.cu.
[CUDA] Don't specify exact line numbers in cuda-builtin-vars.cu.

This makes the test less fragile to changes to cuda_builtin_vars.h.

Test-only change.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@261775 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang