cmQtAutoGenerators: Fix rcc invocation for Qt 5.0 and 5.1 (#15644)

In commit v3.2.0-rc1~480^2 (QtAutogen: Regenerate qrc files if their
input changes, 2014-09-17) we added use of the rcc "--list" option.
Prior to Qt 5.2 this option was called just "-list", and the older name
is still supported by the newer tools.  Use the older name of the option
for compatibility with Qt 5.0 and 5.1.

Source/cmQtAutoGenerators.cxx

@@ -190,7 +190,7 @@ std::string cmQtAutoGenerators::ListQt5RccInputs(cmSourceFile* sf,
 
   std::vector<std::string> command;
   command.push_back(rccCommand);
-  command.push_back("--list");
+  command.push_back("-list");
 
   std::string absFile = cmsys::SystemTools::GetRealPath(
                                               sf->GetFullPath());