luna-sysmgr: bump SRCREV for porting to new libwebos-gui library

* cef7037 Rework to use new libwebos-gui library

Signed-off-by: Simon Busch <morphis@gravedo.de>
libwebos-gui: use old webos-hybris-compositor repository until rename is done

Signed-off-by: Simon Busch <morphis@gravedo.de>