travis.yml: Don't test for GCC on OS X
travis.yml: Don't test for GCC on OS X

GCC on OS X is just a wrapper around Clang, so the test results will
always be identical.

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