Fix out-of-tree clang build due to sysexits change

The sysexists change broke clang building out of tree against llvm.

https://reviews.llvm.org/D88467

Author: airlied

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

@@ -208,9 +208,6 @@
 /* Define to 1 if you have the <sys/types.h> header file. */
 #cmakedefine HAVE_SYS_TYPES_H ${HAVE_SYS_TYPES_H}
 
-/* Define to 1 if you have the <sysexits.h> header file. */
-#cmakedefine HAVE_SYSEXITS_H ${HAVE_SYSEXITS_H}
-
 /* Define if the setupterm() function is supported this platform. */
 #cmakedefine LLVM_ENABLE_TERMINFO ${LLVM_ENABLE_TERMINFO}
 

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

@@ -88,4 +88,7 @@
 /* Define if LLVM was built with a dependency to the tensorflow compiler */
 #cmakedefine LLVM_HAVE_TF_AOT
 
+/* Define to 1 if you have the <sysexits.h> header file. */
+#cmakedefine HAVE_SYSEXITS_H ${HAVE_SYSEXITS_H}
+
 #endif

llvm/include/llvm/Support/ExitCodes.h

@@ -16,7 +16,7 @@
 #ifndef LLVM_SUPPORT_EXITCODES_H
 #define LLVM_SUPPORT_EXITCODES_H
 
-#include "llvm/Config/config.h"
+#include "llvm/Config/llvm-config.h"
 
 #if HAVE_SYSEXITS_H
 #include <sysexits.h>