Add mode_t to the config.h generated by cmake on win32. Used by clang.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64555 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake
index 5158bfe..cbe48d8 100755
--- a/cmake/config-ix.cmake
+++ b/cmake/config-ix.cmake
@@ -69,6 +69,7 @@
 
 if( MSVC )
   set(error_t int)
+  set(mode_t "unsigned short")
   set(LTDL_SHLIBPATH_VAR "PATH")
   set(LTDL_SYSSEARCHPATH "")
   set(LTDL_DLOPEN_DEPLIBS 1)