Add description to Enum options.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2987 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/analyze/analyze.cpp b/tools/analyze/analyze.cpp
index 363f111..8eb15fd 100644
--- a/tools/analyze/analyze.cpp
+++ b/tools/analyze/analyze.cpp
@@ -242,7 +242,8 @@
                            cl::aliasopt(Quiet));
 
 static cl::list<enum Ans>
-AnalysesList(cl::values(
+AnalysesList(cl::desc("Analyses available:"),
+             cl::values(
   clEnumVal(print          , "Print each function"),
   clEnumVal(intervals      , "Print Interval Partitions"),
   clEnumVal(exprs          , "Classify Expressions"),