package/qt5: bump version to 5.15.1

package/qt5: bump version to 5.15.1

qt5base:
 - remove 0005-evdevkeyboard-fix-input_event-time-related-compile.patch
   (upstream [1])
 - remove 0006-evdevtouch-fix-input_event-time-related-compile.patch
   (upstream [2])
 - remove 0007-qimage_conversions-arm-neon-draw-helper-only-availab.patch
   (upstream [3])

qt5declarative:
 - remove 0002-examples-fix-parallel-install.patch
   (superseeded by upstream commit [4])

qt5imageformats:
 - remove 0001-fix-build-on-Arch-Linux.patch
   (upstream [5])

qt5tools:
 - rebased 0001-Disable-designer-tool-fixes-configure-error.patch

qt5webengine:
 - remove 0002-fix-bison-3.7.patch (upstream [6])
 - now unconditionally needs libxkbcommon

[1] https://code.qt.io/cgit/qt/qtbase.git/commit/?id=c5b8b662105cc5ced968da9f567fe1134c52d6b5
[2] https://code.qt.io/cgit/qt/qtbase.git/commit/?id=71fb4d081c7f3675939ac8c62063631a18175fd1
[3] https://code.qt.io/cgit/qt/qtbase.git/commit/?id=2246f270ffd3875cad8c334fdf4878be48620514
[4] https://code.qt.io/cgit/qt/qtdeclarative.git/commit/?id=1f0b3a54ffa2ab0dc0cdff1345980ea68d749d24
[5] https://code.qt.io/cgit/qt/qtimageformats.git/commit/?id=704868db61be1542c2d9e2b75ead00c45c56cc36
[6] https://code.qt.io/cgit/qt/qtwebengine-chromium.git/commit/?h=80-based&id=1a53f5995697f5ac6fd501dbdc0ee39c9488ee66

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>