package/qt5location: isolate patch to qt5location 5.9.1

The patch only applies to the 5.9.1 version, not 5.6.*.  This moves the
patch into the appropriate directory.

Fixes:
http://autobuild.buildroot.net/results/676abe008c9c4bddfddd7b041d8db9999e9e899d

Cc: Julien Corjon <corjon.j@ecagroup.com>
Cc: Peter Seiderer <ps.report@gmx.net>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Joshua Henderson <joshua.henderson@microchip.com>
Reviewed-by: Peter Seiderer <ps.report@gmx.net>
[Arnout: slightly edit commit message]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>