qml_plugin.prf: moc plugin with -Muri=$$TARGETPATH

When we build qml plugins, we now depend on embedding
the uri of the plugin into its meta-data using the new
-M switch to moc for static builds.

This patch will let this happen automatically whenever you
call load(qml_plugin) from your pro file.

With this patch, you only need to rebuild your plugin
to support static applications.

Task-number: QTBUG-28357
Change-Id: I99e2fc80688fa43cf734551553f4fa0cb5ed47ed
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>

mkspecs/features/qml_plugin.prf

@@ -25,6 +25,11 @@ if(win32|mac):!macx-xcode {
 }
 isEmpty(TARGETPATH): TARGETPATH = $$eval(QT.$${CXX_MODULE}.name)
 
+# Insert the plugins URI into its meta data to enable usage
+# of static plugins in QtDeclarative:
+URI = $$replace(TARGETPATH, "/", ".")
+QMAKE_MOC_OPTIONS += -Muri=$$URI
+
 QMLTYPEFILE = $$_PRO_FILE_PWD_/plugins.qmltypes
 exists($$QMLTYPEFILE): QML_FILES += $$QMLTYPEFILE