build: Check for sys/resource.h in Meson as well
build: Check for sys/resource.h in Meson as well

The autotools builds checked for sys/resource.h, so we ought to check
for that as well in the Meson build files.

https://bugzilla.gnome.org/show_bug.cgi?id=785767

GNOME/gdk-pixbuf,GNOME/gdk-pixbuf,GNOME/gdk-pixbuf,GNOME/gdk-pixbuf