gnome.generate_gir(): Add install_dir_gir and install_dir_typelib
gnome.generate_gir(): Add install_dir_gir and install_dir_typelib

A generic `install_dir` is less useful and didn't work so just ignore it

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