folks fails to cross build from source, because its meson.build attempts
to locate g-ir-compiler using find_program. As such, it does not pay
attention to the cross compilation prefix and locates the build
architecture instance, which doesn't work. I am proposing a change to
look up the right tool via pkg-config falling back to the prior method.
Once doing so, the cross build runs into #1126007. Please consider
applying the attached patch and forwarding it upstream.

Helmut