sdk: add global documentation templates from qtbase

Needed to generate documentation

Task-number: QTBUG-57889
Change-Id: If334d2076a5914550a18639c4c9b9d3596ab070a
Reviewed-by: Rainer Keller <Rainer.Keller@qt.io>

recipes-qt/packagegroups/packagegroup-b2qt-embedded-qt5-toolchain-target.bb

@@ -44,6 +44,7 @@ RDEPENDS_${PN} += " \
     qt3d-dev \
     qtbase-dev \
     qtbase-staticdev \
+    qtbase-doc \
     qtcanvas3d-dev \
     qtcharts-dev \
     qtconnectivity-dev \