clover: Fix build after clang r348827

CodeGenOptions were moved to Basic.

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
Reviewed-by: Aaron Watry <awatry@gmail.com>
Tested-by: Aaron Watry <awatry@gmail.com>
Reviewed-by: Kai Wasserbäch <kai@dev.carbon-project.org>
CC: mesa-stable@lists.freedesktop.org

src/gallium/state_trackers/clover/llvm/compat.hpp

@@ -58,9 +58,14 @@
 #include <llvm/Analysis/TargetLibraryInfo.h>
 
 #include <clang/Basic/TargetInfo.h>
-#include <clang/Frontend/CodeGenOptions.h>
 #include <clang/Frontend/CompilerInstance.h>
 
+#if HAVE_LLVM >= 0x0800
+#include <clang/Basic/CodeGenOptions.h>
+#else
+#include <clang/Frontend/CodeGenOptions.h>
+#endif
+
 namespace clover {
    namespace llvm {
       namespace compat {