qt5: downgrade to 5.6

qt5: downgrade to 5.6

* webosose isn't compatible with newer Qt

export COMP=qml-webos-framework; for i in `seq -w 1 999`; do echo $i; bitbake -v -v -DDDD -f -c compile ${COMP} 2>${COMP}-logerr.$i >${COMP}-log.$i; bitbake  -v -v -DDDD -f -c package_qa ${COMP} 2>${COMP}-logerr.qa.$i >${COMP}-log.qa.$i || { cp -ra tmp-glibc/work/qemux86-oe-linux/${COMP}/ ${COMP}-workdir-$i; bitbake -c cleansstate ${COMP} ; } done

in local.conf I have only this to reproduce the failures:
PRSERV_HOST = "localhost:0"

BB_NUMBER_THREADS = "8"
PARALLEL_MAKE = "-j 32"

DISTRO_FEATURES_append = " wayland opengl"
ERROR_QA_append = " host-user-contaminated"

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>