[lldb][DWARF] Search for symbols in all external modules (llvm#75927)

The way this code was updated in
dd95877 meant that if the first module
did not have the symbol, the iteration stopped as returning true means
stop. So only if every module had the symbol would we find it, in the
last module.

Invert the condition to break when we find the first instance, which is
what the previous code did.

Author: DavidSpickett

lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp

@@ -175,7 +175,7 @@ TypeSP DWARFASTParserClang::ParseTypeFromClangModule(const SymbolContext &sc,
         *sc.comp_unit, results.GetSearchedSymbolFiles(), [&](Module &module) {
           module.FindTypes(query, results);
           pcm_type_sp = results.GetTypeMap().FirstType();
-          return !pcm_type_sp;
+          return (bool)pcm_type_sp;
         });
   }