Qt 3D Studio wip's not in synch in qt5

Update all three WIP branches origin/wip/qt3dstudio/master, origin/wip/qt3d-runtime/master and origin/wip/qt3dstudio/runtime2 to point to head of 5.11.2 branch (at the moment SHA1 e49e7fc8ad4f29ff35bc0d1b21341737b9036724).

Following WIP branches should always point to same exact version, at minimum they should point to same branch in qt5:

• origin/wip/qt3dstudio/master (dev branch of Qt 3D Studio editor)
• origin/wip/qt3d-runtime/master (dev branch of Qt 3D Studio Qt 3D based runtime)
• origin/wip/qt3dstudio/runtime2 (wip branch of integrating the Qt 3D based runtime to Qt 3D Studio editor).

At the moment this is not the case. origin/wip/qt3d-runtime/master now points to SHA1 ddb78a7c4a13e06b8c87bd86df72c3d039739fc5 in qt5 that is from 5.11.2 branch and others point still to old 5.11 branch commit.