DebugInfo: Add a clang test for LLVM fix for PR23332
DebugInfo: Add a clang test for LLVM fix for PR23332

Add a clang test for LLVM r235955, which added support for up to 2^16
arguments.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@235956 91177308-0d34-0410-b5e6-96231b3b80d8

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