webos-hybris-compositor: rename to libwebos-gui and bump SRCREV

* c89c103 Rename library to libwebos-gui
* 4da5e69 Rename classes from HybrisCompositor* to WebosSurfaceManager*

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