Fix PATH setting in AppVeyor.
Fix PATH setting in AppVeyor.

Without the trailing semicolon, an errant space is inserted into the
last directory entry.

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