Detect Qt5 properly on more platforms.
Detect Qt5 properly on more platforms.

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