[analyzer] Don't run the analyzer for -analyzer-list-enabled-checkers

[Szelethus]

Summary

Short and sweet. Whenever I use -analyzer-list-enabled-checkers, I'm only interested about the configuration, not about the analysis.

[NoQ]

You can probably write a test for it via -analyzer-display-progress?

[NoQ]

Umm, this test fails for me locally because i see osx checkers displayed in the list. Which is weird because they're supposed to be enabled based on the target platform, not on the host platform.

[NoQ]

rC371781.

clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp

#if CLANG_ENABLE_STATIC_ANALYZER
 
   // Honor -analyzer-list-enabled-checkers.
   if (AnOpts.ShowEnabledCheckerList) {
     ento::printEnabledCheckerList(llvm::outs(),
                                   Clang->getFrontendOpts().Plugins,
                                   AnOpts,
                                   Clang->getDiagnostics(),
                                   Clang->getLangOpts());
+    return true;
   }
 
   // Honor -analyzer-config-help.
   if (AnOpts.ShowConfigOptionsList) {
     ento::printAnalyzerConfigList(llvm::outs());
     return true;
   }
 #endif