Added folder hs_app_idlefw, files there have 'hs_app' prefix(content edited).
homescreen_srv compiles with these changes. Although more warnings appear.
Also I've changed uid of homescreen.exe, ailaunch.exe.
Renamed idlefw files, located in hs_app_idlefw.
<layer name="homescreensrv">
<module name="group_homescreensrv">
<component name="group_homescreensrv">
<unit unitID="homescreensrv" mrp="" bldFile="&layer_real_source_path;\group" name="homescreensrv" />
</component>
</module>
</layer>