qt5base: fix license

qt5base: fix license

- Since QT 5.11, LICENSE.GPLv3 doesn't exist anymore so use LICENSE.GPL3
  and add its hash
- Update hash of LICENSE.LGPLv3 (as it now makes a reference to
  LICENSE.GPL3 instead of LICENSE.GPLv3)
- Update hash of header.BSD (year is now YYYY instead of 2016)

Fixes:
 - http://autobuild.buildroot.net/results/b8add9b9a2defe5e64330714e9768ffa6393adc0

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Reviewed-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>