tst_QFactoryLoader: includemocs

For some reason android in CI failed to include the
moc file through the mocs_compilation file.

It's an issue that needs some investigation, but
in the interest of time just include the moc file
directly.

Pick-to: 6.7 6.6 6.5
Change-Id: I079588598a6f4137ef1fccc482795d703b59bc6e
Reviewed-by:  Alexey Edelev <alexey.edelev@qt.io>

tests/auto/corelib/plugin/qfactoryloader/plugin1/plugin1.cpp

@@ -7,3 +7,5 @@ QString Plugin1::pluginName() const
 {
     return QLatin1String("Plugin1 ok");
 }
+
+#include "moc_plugin1.cpp"

tests/auto/corelib/plugin/qfactoryloader/plugin2/plugin2.cpp

@@ -7,3 +7,5 @@ QString Plugin2::pluginName() const
 {
     return QLatin1String("Plugin2 ok");
 }
+
+#include "moc_plugin2.cpp"