CodeGen: correct assertion
CodeGen: correct assertion

The assertion added earlier was overly strict.  We need to strip the pointer
casts (as when constructing the GV).  Correct the types (Function or Variable).

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@271750 91177308-0d34-0410-b5e6-96231b3b80d8

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