Basic support for parsing Mach-O universal binaries in LLVMObject library

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184191 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Support/FileSystem.h

@@ -199,6 +199,7 @@ struct file_magic {
     macho_bundle,             ///< Mach-O Bundle file
     macho_dynamically_linked_shared_lib_stub, ///< Mach-O Shared lib stub
     macho_dsym_companion,     ///< Mach-O dSYM companion file
+    macho_universal_binary,   ///< Mach-O universal binary
     coff_object,              ///< COFF object file
     pecoff_executable         ///< PECOFF executable file
   };