Bug#1079737: libgtk-3-0t64: "Exec format error" in foreign-arch installation

[Daniel Richard G.]

Package: libgtk-3-0t64
Version: 3.24.43-3

I am installing this package as a cross-compilation dependency for an
amd64-to-armhf build. In the install log, I see

    Setting up libgtk-3-0t64:armhf (3.24.43-3) ...
    /var/lib/dpkg/info/libgtk-3-0t64:armhf.postinst: 17: /usr/lib/arm-linux-gnueabihf/libgtk-3-0t64/gtk-query-immodules-3.0: Exec format error

The postinst script should check that the package is being installed on
a compatible architecture before running this (binary) program.