data: Update boilerplate from MIT X11 license to MIT Expat license
data: Update boilerplate from MIT X11 license to MIT Expat license

Tarnyko/weston-xdg_surface_present,mchalupa/weston,Fantu/compositor-spice,krezovic/weston,Gnurou/weston,xorgy/weston,sir-murray/weston,Gnurou/weston,udoprog/weston,sir-murray/weston,giucam/weston,kwm81/weston,eyolfson/weston,giucam/weston,eyolfson/weston,Fantu/compositor-spice,jonnylamb/weston,krezovic/weston,Tarnyko/weston-xdg_surface_present,kwm81/weston,jonnylamb/weston,Fantu/compositor-spice,mchalupa/weston,udoprog/weston,xorgy/weston