clover: Fix build against clang SVN >= r267772

(Re-pushing previous fix for clang SVN r265359, which was reverted in
the meantime)

Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>

src/gallium/state_trackers/clover/llvm/invocation.cpp

@@ -206,6 +206,9 @@ namespace {
       // http://www.llvm.org/bugs/show_bug.cgi?id=19735
       c.getDiagnosticOpts().ShowCarets = false;
       c.getInvocation().setLangDefaults(c.getLangOpts(), clang::IK_OpenCL,
+#if HAVE_LLVM >= 0x0309
+                                        llvm::Triple(triple),
+#endif
                                         clang::LangStandard::lang_opencl11);
       c.createDiagnostics(
                           new clang::TextDiagnosticPrinter(