File set-revision.patch of Package llvm-roc

Index: clang-roc-2.2.0/lib/Basic/Version.cpp
===================================================================
--- clang-roc-2.2.0/lib/Basic/Version.cpp	2019-03-19 15:51:24.885285368 +0100
+++ clang-roc-2.2.0/lib/Basic/Version.cpp	2019-03-19 16:00:52.208750197 +0100
@@ -79,11 +79,7 @@ std::string getClangRevision() {
 }
 
 std::string getLLVMRevision() {
-#ifdef LLVM_REVISION
   return LLVM_REVISION;
-#else
-  return "";
-#endif
 }
 
 std::string getClangFullRepositoryVersion() {