Doc: fix links to documentation in other modules

Add the depends variable with all modules as values,
because the QT variable value documentation should list
the import statements for all modules.

This patch enables linking to other modules.

Change-Id: I521ac22bac27d79537c14583f6592251288974a4
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>

qmake/doc/qmake.qdocconf

@@ -22,5 +22,54 @@ language                = Cpp
 
 sources                 = src/qmake-manual.qdoc
 
+depends += \
+    activeqt \
+    qt3d \
+    qtassistant \
+    qtbluetooth \
+    qtconcurrent \
+    qtcontacts \
+    qtcore \
+    qtdbus \
+    qtdesigner \
+    qtfeedback \
+    qtgraphicaleffects \
+    qtgui \
+    qthelp \
+    qtimageformats \
+    qtlinguist \
+    qtlocation \
+    qtmultimedia \
+    qtmultimediawidgets \
+    qtnetwork \
+    qtopengl \
+    qtorganizer \
+    qtprintsupport \
+    qtpublishsubscribe \
+    qtqml \
+    qtquick \
+    qtquickcontrols \
+    qtquickcontrolsstyles \
+    qtquickdialogs \
+    qtquicklayouts \
+    qtscript \
+    qtscripttools \
+    qtsensors \
+    qtserialport \
+    qtserviceframework \
+    qtsql \
+    qtsvg \
+    qtsysteminfo \
+    qttestlib \
+    qttools \
+    qtuitools \
+    qtversit \
+    qtwebkit \
+    qtwebkitexamples \
+    qtwidgets \
+    qtx11extras \
+    qtxml \
+    qtxmlpatterns
+
 imagedirs               = src/images
 exampledirs             = src