Xcode: use correct key for file id lookup.
Xcode: use correct key for file id lookup.

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