interpreter: Also process *TargetHolder returned by modules
interpreter: Also process *TargetHolder returned by modules

The module might need to add extra methods on the returned targets
and thus it can return TargetHolders, we should process the
held targets

becm/meson,mesonbuild/meson,becm/meson,MathieuDuponchelle/meson,MathieuDuponchelle/meson,pexip/meson,jeandet/meson,jpakkane/meson,MathieuDuponchelle/meson,MathieuDuponchelle/meson,mesonbuild/meson,QuLogic/meson,becm/meson,becm/meson,MathieuDuponchelle/meson,MathieuDuponchelle/meson,jpakkane/meson,mesonbuild/meson,mesonbuild/meson,QuLogic/meson,jpakkane/meson,MathieuDuponchelle/meson,mesonbuild/meson,becm/meson,QuLogic/meson,mesonbuild/meson,jeandet/meson,QuLogic/meson,jpakkane/meson,pexip/meson,jpakkane/meson,becm/meson,mesonbuild/meson,mesonbuild/meson,becm/meson,MathieuDuponchelle/meson,jpakkane/meson,pexip/meson,pexip/meson,jeandet/meson,becm/meson,jeandet/meson,pexip/meson,QuLogic/meson,pexip/meson,pexip/meson,becm/meson,QuLogic/meson,mesonbuild/meson,pexip/meson,MathieuDuponchelle/meson,jpakkane/meson,QuLogic/meson,jeandet/meson,becm/meson,jeandet/meson,pexip/meson,jeandet/meson,jeandet/meson,jpakkane/meson,QuLogic/meson,mesonbuild/meson,jeandet/meson,jpakkane/meson,pexip/meson,QuLogic/meson