Intoduce '-analyzer-checker-help' flag which outputs a list of all available static analyzer checkers.

This is pretty basic for now, eventually checkers should be grouped according to package, hidden checkers should be indicated etc.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126454 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Driver/CC1Options.td b/include/clang/Driver/CC1Options.td
index 6cb85a3..748e6cf 100644
--- a/include/clang/Driver/CC1Options.td
+++ b/include/clang/Driver/CC1Options.td
@@ -105,6 +105,9 @@
 def analyzer_disable_checker_EQ : Joined<"-analyzer-disable-checker=">,
   Alias<analyzer_disable_checker>;
 
+def analyzer_checker_help : Flag<"-analyzer-checker-help">,
+  HelpText<"Display the list of analyzer checkers that are available">;
+
 //===----------------------------------------------------------------------===//
 // CodeGen Options
 //===----------------------------------------------------------------------===//