qt5location: fix build failure due to missing qt5base gui dependency

qt5location fails to build due to missing Qt5 Gui module.
In configure.json features.opengl is referred, but it is available only
if qt5base gui submodule is built.

Add BR2_PACKAGE_QT5BASE_GUI to qt5location Config.in to assure gui
submodule is built before qt5location.

Fixes:
http://autobuild.buildroot.org/results/1e1/1e12a819750c677c9ef204a324c8bf06212e5135/
http://autobuild.buildroot.org/results/223/223ec6565beba1ca73d4ff488296feec53656b40/
http://autobuild.buildroot.org/results/84f/84fe1c84e3537167ee3791e83c9fe2cc2805ccb5/
http://autobuild.buildroot.org/results/9c9/9c96d2106222e623a379f9995bd059725eb27769/
http://autobuild.buildroot.org/results/fa0/fa01513d28d896ca8819966c5b1ed5c35283e92f/
http://autobuild.buildroot.org/results/5d7/5d7333470c31b83c697218382dc77f74af86c666/
http://autobuild.buildroot.org/results/db7/db7b4c61bb41d32e0f7960c194588cd1559ff3f7/
http://autobuild.buildroot.org/results/2b7/2b71f186b8d67c4805393c9c016d641893d46220/
http://autobuild.buildroot.org/results/1e1/1e12a819750c677c9ef204a324c8bf06212e5135/

Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/qt5/qt5location/Config.in

@@ -1,6 +1,7 @@
 config BR2_PACKAGE_QT5LOCATION
 	bool "qt5location"
 	select BR2_PACKAGE_QT5BASE
+	select BR2_PACKAGE_QT5BASE_GUI
 	help
 	  Qt is a cross-platform application and UI framework for
 	  developers using C++.