Use ninja backend on OSX CI builds.
Use ninja backend on OSX CI builds.

trhd/meson,aaronp24/meson,QuLogic/meson,MathieuDuponchelle/meson,centricular/meson,mesonbuild/meson,jpakkane/meson,pexip/meson,jpakkane/meson,centricular/meson,ernestask/meson,becm/meson,QuLogic/meson,wberrier/meson,MathieuDuponchelle/meson,wberrier/meson,MathieuDuponchelle/meson,trhd/meson,centricular/meson,germandiagogomez/meson,trhd/meson,jpakkane/meson,fmuellner/meson,QuLogic/meson,centricular/meson,becm/meson,jpakkane/meson,aaronp24/meson,rhd/meson,thiblahute/meson,centricular/meson,MathieuDuponchelle/meson,QuLogic/meson,germandiagogomez/meson,rhd/meson,aaronp24/meson,mesonbuild/meson,germandiagogomez/meson,mesonbuild/meson,fmuellner/meson,QuLogic/meson,rhd/meson,MathieuDuponchelle/meson,becm/meson,centricular/meson,fmuellner/meson,aaronp24/meson,fmuellner/meson,thiblahute/meson,fmuellner/meson,becm/meson,MathieuDuponchelle/meson,jpakkane/meson,trhd/meson,ernestask/meson,trhd/meson,QuLogic/meson,becm/meson,fmuellner/meson,becm/meson,becm/meson,jpakkane/meson,pexip/meson,wberrier/meson,fmuellner/meson,ernestask/meson,ernestask/meson,jeandet/meson,germandiagogomez/meson,jeandet/meson,ernestask/meson,jpakkane/meson,aaronp24/meson,germandiagogomez/meson,wberrier/meson,jpakkane/meson,aaronp24/meson,thiblahute/meson,germandiagogomez/meson,trhd/meson,jeandet/meson,thiblahute/meson,mesonbuild/meson,fmuellner/meson,aaronp24/meson,jeandet/meson,centricular/meson,ernestask/meson,centricular/meson,thiblahute/meson,jeandet/meson,ernestask/meson,fmuellner/meson,pexip/meson,mesonbuild/meson,MathieuDuponchelle/meson,ernestask/meson,trhd/meson,rhd/meson,wberrier/meson,MathieuDuponchelle/meson,rhd/meson,QuLogic/meson,jeandet/meson,trhd/meson,becm/meson,mesonbuild/meson,QuLogic/meson,pexip/meson,thiblahute/meson,pexip/meson,mesonbuild/meson,thiblahute/meson,becm/meson,MathieuDuponchelle/meson,jeandet/meson,aaronp24/meson,pexip/meson,rhd/meson,jeandet/meson,jeandet/meson,thiblahute/meson,wberrier/meson,ernestask/meson,wberrier/meson,thiblahute/meson,aaronp24/meson,becm/meson,jpakkane/meson,trhd/meson,QuLogic/meson,pexip/meson,pexip/meson,wberrier/meson,mesonbuild/meson,rhd/meson,mesonbuild/meson,germandiagogomez/meson,mesonbuild/meson,pexip/meson,rhd/meson,pexip/meson