add a prototype for __builtin_fpclassify.  We don't know how to codegen it, so we get 'cannot compile this builtin function yet' errors, just like we do currently for __builtin_isinf.  However, this should let us parse headers that use it without barfing, which should help PR6083.
add a prototype for __builtin_fpclassify.  We don't know how to
codegen it, so we get 'cannot compile this builtin function yet'
errors, just like we do currently for __builtin_isinf.  However,
this should let us parse headers that use it without barfing,
which should help PR6083.



git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@94346 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/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,llvm-mirror/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