Fix Windows build by including CGFunctionInfo.h.
Fix Windows build by including CGFunctionInfo.h.

CodeGenTypes.h instantiates llvm::FoldingSet<> with CGFunctionInfo,
and VC++ doesn't like the static_cast from FoldingSetImpl::Node* to
CGFunctionInfo* since it hasn't seen the definition of CGFunctionInfo
and that it inherits from FoldingSetImpl::Node.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@193722 91177308-0d34-0410-b5e6-96231b3b80d8

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