Boost: Pick correct version
Boost: Pick correct version

If many binary packages are installed, pick the one built with the correct
toolset. Fixes #2532

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