[analyzer] Initialize ShouldEmitErrorsOnInvalidConfigValue analyzer option

[steakhal]

Summary

Downstream users who don't make use of the clang cc1 frontend for
commandline argument parsing, won't benefit from the Marshalling
provided default initialization of the AnalyzerOptions entries. More
about this later.
Those analyzer option fields, as they are bitfields, cannot be default
initialized at the declaration (prior c++20), hence they are initialized
at the constructor.
The only problem is that ShouldEmitErrorsOnInvalidConfigValue was
forgotten.

In this patch, I'm proposing to initialize that field with the rest.

Note that this value is read by
CheckerRegistry.cpp:insertAndValidate().
The analyzer options are initialized by the marshalling at
CompilerInvocation.cpp:GenerateAnalyzerArgs() by the expansion of the
ANALYZER_OPTION_WITH_MARSHALLING xmacro to the appropriate default
value regardless of the constructor initialized list which I'm touching.
Due to that this only affects users using CSA as a library, without
serious effort, I believe we cannot test this.

[martong]

Okay, I don't see any problem with this change. LGTM.

clang/include/clang/StaticAnalyzer/Core/AnalyzerOptions.h

return !std::binary_search(AnalyzerConfigCmdFlags.begin(),
                                AnalyzerConfigCmdFlags.end(), Name);
   }
 
   AnalyzerOptions()
       : DisableAllCheckers(false), ShowCheckerHelp(false),
         ShowCheckerHelpAlpha(false), ShowCheckerHelpDeveloper(false),
         ShowCheckerOptionList(false), ShowCheckerOptionAlphaList(false),
         ShowCheckerOptionDeveloperList(false), ShowEnabledCheckerList(false),
-        ShowConfigOptionsList(false), AnalyzeAll(false),
+        ShowConfigOptionsList(false),
+        ShouldEmitErrorsOnInvalidConfigValue(false), AnalyzeAll(false),
         AnalyzerDisplayProgress(false), eagerlyAssumeBinOpBifurcation(false),
         TrimGraph(false), visualizeExplodedGraphWithGraphViz(false),
         UnoptimizedCFG(false), PrintStats(false), NoRetryExhausted(false),
         AnalyzerWerror(false) {
     llvm::sort(AnalyzerConfigCmdFlags);
   }
 
   /// Interprets an option's string value as a boolean. The "true" string is