coreos/config: Export PKG_CONFIG for incus

Incus build uses pkg-config support in Go to link against some library.
This needs the correct sysroot version of PKG_CONFIG to be exported.

Signed-off-by: Jeremi Piotrowski <[email protected]>
Co-Authored-By: Mathieu Tortuyaux <[email protected]>

Author: jepio

sdk_container/src/third_party/coreos-overlay/coreos/config/env/app-containers/incus

@@ -0,0 +1,3 @@
+cros_pre_src_compile_pkgconfig() {
+	export PKG_CONFIG="$(tc-getPKG_CONFIG)"
+}