configure.ac: Bump to 1.1.90 to open master for 1.2 work
configure.ac: Bump to 1.1.90 to open master for 1.2 work

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