compilers: Add prefix before limits.h in has_function checks
compilers: Add prefix before limits.h in has_function checks

prefix might define _GNU_SOURCE, which *must* be defined before your
first include of limits.h, so we must define it first.

There's not really any downsides to including limits.h after the
prefix.

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