[analyzer] New flag to print all -analyzer-config options

A new -cc1 flag is avaible for the said purpose: -analyzer-config-help

Differential Revision: https://reviews.llvm.org/D53296

llvm-svn: 345989
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index d78c133..d592959 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -279,6 +279,7 @@
   }
 
   Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
+  Opts.ShowConfigOptionsList = Args.hasArg(OPT_analyzer_config_help);
   Opts.ShowEnabledCheckerList = Args.hasArg(OPT_analyzer_list_enabled_checkers);
   Opts.DisableAllChecks = Args.hasArg(OPT_analyzer_disable_all_checks);