tests: Don't fail wxwidgets test if wxwidgets is not installed (#639)
tests: Don't fail wxwidgets test if wxwidgets is not installed (#639)

The widgets pull in lots of deprecated libraries, so don't require it
becm/meson,pexip/meson,QuLogic/meson,fmuellner/meson,mesonbuild/meson,wberrier/meson,jpakkane/meson,QuLogic/meson,aaronp24/meson,fmuellner/meson,jeandet/meson,thiblahute/meson,fmuellner/meson,thiblahute/meson,jeandet/meson,trhd/meson,fmuellner/meson,rhd/meson,becm/meson,rhd/meson,trhd/meson,MathieuDuponchelle/meson,becm/meson,pexip/meson,becm/meson,centricular/meson,pexip/meson,ernestask/meson,jpakkane/meson,rhd/meson,rhd/meson,wberrier/meson,aaronp24/meson,centricular/meson,trhd/meson,jpakkane/meson,thiblahute/meson,trhd/meson,jpakkane/meson,trhd/meson,centricular/meson,pexip/meson,aaronp24/meson,trhd/meson,jeandet/meson,MathieuDuponchelle/meson,rhd/meson,fmuellner/meson,MathieuDuponchelle/meson,pexip/meson,centricular/meson,fmuellner/meson,jeandet/meson,ernestask/meson,centricular/meson,fmuellner/meson,centricular/meson,jeandet/meson,becm/meson,thiblahute/meson,mesonbuild/meson,jpakkane/meson,fmuellner/meson,thiblahute/meson,wberrier/meson,MathieuDuponchelle/meson,becm/meson,aaronp24/meson,fmuellner/meson,becm/meson,ernestask/meson,mesonbuild/meson,ernestask/meson,jpakkane/meson,QuLogic/meson,trhd/meson,mesonbuild/meson,pexip/meson,rhd/meson,rhd/meson,mesonbuild/meson,thiblahute/meson,centricular/meson,mesonbuild/meson,thiblahute/meson,jeandet/meson,mesonbuild/meson,pexip/meson,QuLogic/meson,jpakkane/meson,thiblahute/meson,jpakkane/meson,QuLogic/meson,mesonbuild/meson,ernestask/meson,QuLogic/meson,MathieuDuponchelle/meson,pexip/meson,becm/meson,ernestask/meson,QuLogic/meson,wberrier/meson,aaronp24/meson,becm/meson,wberrier/meson,MathieuDuponchelle/meson,aaronp24/meson,MathieuDuponchelle/meson,MathieuDuponchelle/meson,ernestask/meson,wberrier/meson,thiblahute/meson,trhd/meson,jpakkane/meson,pexip/meson,jeandet/meson,becm/meson,trhd/meson,wberrier/meson,mesonbuild/meson,jeandet/meson,pexip/meson,QuLogic/meson,centricular/meson,ernestask/meson,MathieuDuponchelle/meson,jeandet/meson,QuLogic/meson,aaronp24/meson,wberrier/meson,mesonbuild/meson,aaronp24/meson,aaronp24/meson,ernestask/meson,rhd/meson