remove CMake mode_t define

It's now replaced with a simple ifdef _MSC_VER in the one
place it's needed (clang's FileManager.h header).

llvm-svn: 133711

llvm/cmake/config-ix.cmake

@@ -349,7 +349,6 @@ endif( MINGW )
 
 if( MSVC )
   set(error_t int)
-  set(mode_t "unsigned short")
   set(LTDL_SHLIBPATH_VAR "PATH")
   set(LTDL_SYSSEARCHPATH "")
   set(LTDL_DLOPEN_DEPLIBS 1)

llvm/include/llvm/Config/config.h.cmake

@@ -686,9 +686,6 @@
    `char[]'. */
 #undef YYTEXT_POINTER
 
-/* Define to a type to use for `mode_t' if it is not otherwise available. */
-#cmakedefine mode_t ${mode_t}
-
 /* Define to a function replacing strtoll */
 #cmakedefine strtoll ${strtoll}