packagegroup-qt5-toolchain-target: always include qttools packages

packagegroup-qt5-toolchain-target: always include qttools packages

The qttools packages were included only if the ruby layer was enabled
as it required qtwebkit. However, qttools now has a PACKAGECONFIG
option for qtwebkit and does not enable it by default so we can include
the qttools packages even if the ruby layer is not enabled.

(From meta-qt5 rev: c4de929f3824375cc4cc5a6c9082f101ea22bc84)

Signed-off-by: Jonathan Liu <net147@gmail.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>