Use rc version suffix

Author: tstellar

llvm/CMakeLists.txt

@@ -25,7 +25,7 @@ if(NOT DEFINED LLVM_VERSION_PATCH)
   set(LLVM_VERSION_PATCH 0)
 endif()
 if(NOT DEFINED LLVM_VERSION_SUFFIX)
-  set(LLVM_VERSION_SUFFIX git)
+  set(LLVM_VERSION_SUFFIX rc)
 endif()
 
 if (NOT PACKAGE_VERSION)