qt: QtDeclarative needs script support as well

Otherwise configure errors out with:

Error: QtDeclarative was requested, but it can't be built due to
QtScript or QtGui being disabled.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/qt/Config.in

@@ -380,6 +380,7 @@ config BR2_PACKAGE_QT_SCRIPTTOOLS
 
 config BR2_PACKAGE_QT_DECLARATIVE
 	bool "Declarative module"
+	depends on BR2_PACKAGE_QT_SCRIPT
 	depends on BR2_PACKAGE_QT_GUI_MODULE
 	help
 	  Build the Qt Declarative Module for qml support