Shortened driver option for running the GR-constants analysis to --grconstants.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@46076 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Driver/clang.cpp b/Driver/clang.cpp
index e73fac9..17df87a 100644
--- a/Driver/clang.cpp
+++ b/Driver/clang.cpp
@@ -109,7 +109,7 @@
                         "Flag warnings of stores to dead variables."),
              clEnumValN(WarnUninitVals, "warn-uninit-values",
                         "Flag warnings of uses of unitialized variables."),
-             clEnumValN(AnalysisGRConstants, "gr-const-prop",
+             clEnumValN(AnalysisGRConstants, "grconstants",
                         "Perform path-sensitive constant propagation."),
              clEnumValN(TestSerialization, "test-pickling",
                         "Run prototype serializtion code."),