Description: Add dependency on ui target to wms provider.
In file included from /<<BUILDDIR>>/qgis-2.18.18+dfsg/debian/build/src/providers/wms/../../ui/ui_qgsgenericprojectionselectorbase.h:21:0,
from /<<BUILDDIR>>/qgis-2.18.18+dfsg/src/providers/wms/../../gui/qgsgenericprojectionselector.h:20,
from /<<BUILDDIR>>/qgis-2.18.18+dfsg/src/providers/wms/qgswmssourceselect.cpp:26:
/<<BUILDDIR>>/qgis-2.18.18+dfsg/src/providers/wms/../../gui/qgsprojectionselector.h:14:10: fatal error: ui_qgsprojectionselectorbase.h: No such file or directory