When building agl-demo-platform-crosssdk, qtwebkit is pulled and built
due to packagegroup-qt5-toolchain-target.
This commit breaks the dependency between packagegroup-qt5-toolchain-target
and qtwebkit.
Bug-AGL: SPEC-1159
Change-Id: I6e6d705c1407faa3f8ab8fe0d5e1fc39f0b15a6f
Signed-off-by: Stephane Desneux <stephane.desneux@iot.bzh>
(cherry picked from commit
ea4276348fa0eb54be3240f69c269278c4a36acd)