actiona fails to cross build from source for two reasons.

For one thing its common.pri hard codes the build architecture
pkg-config. qmake does have native support for pkg-config and once using
it, it automatically works for cross builds.

For running lrelease, a build dependency on qt5-qmake:native is
required.

The attached patch fixes both and makes actiona cross buildable. Please
consider applying it.

Helmut