Don't rebuild tests during listing.
Don't rebuild tests during listing.

`mesontest --list` doesn't need to rebuild tests.

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