Xcode: add functionality for sources created with a generator.
Xcode: add functionality for sources created with a generator.

pexip/meson,jpakkane/meson,jpakkane/meson,mesonbuild/meson,mesonbuild/meson,QuLogic/meson,QuLogic/meson,jpakkane/meson,QuLogic/meson,pexip/meson,pexip/meson,QuLogic/meson,mesonbuild/meson,mesonbuild/meson,QuLogic/meson,mesonbuild/meson,pexip/meson,jpakkane/meson,pexip/meson,QuLogic/meson,QuLogic/meson,jpakkane/meson,pexip/meson,jpakkane/meson,jpakkane/meson,pexip/meson,mesonbuild/meson,pexip/meson,jpakkane/meson,QuLogic/meson,pexip/meson,mesonbuild/meson,mesonbuild/meson,mesonbuild/meson,mesonbuild/meson,jpakkane/meson,QuLogic/meson,pexip/meson