Factor out an _add_languages() function in introspector
Factor out an _add_languages() function in introspector

Factor out an _add_languages() function in introspector, rather than
calling func_add_languages() with arguments crafted to fake an
interpreter call.

jpakkane/meson,pexip/meson,QuLogic/meson,pexip/meson,mesonbuild/meson,QuLogic/meson,mesonbuild/meson,mesonbuild/meson,QuLogic/meson,pexip/meson,mesonbuild/meson,jpakkane/meson,pexip/meson,jpakkane/meson,pexip/meson,jpakkane/meson,mesonbuild/meson,QuLogic/meson,QuLogic/meson,pexip/meson,mesonbuild/meson,jpakkane/meson,pexip/meson,jpakkane/meson,mesonbuild/meson,QuLogic/meson,jpakkane/meson,mesonbuild/meson,pexip/meson,jpakkane/meson,QuLogic/meson,mesonbuild/meson,QuLogic/meson,QuLogic/meson,pexip/meson,jpakkane/meson,mesonbuild/meson,pexip/meson