meson_install: rename 'data' to 'd' for consistency
meson_install: rename 'data' to 'd' for consistency

All other functions call it 'd', let's do it here too

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