Opengcs FTBFS on 32 bit architectures

From https://launchpadlibrarian.net/355385255/buildlog_ubuntu-bionic-i386.opengcs_0.3.4+dfsg2-0ubuntu1_BUILDING.txt.gz :

github.com/Microsoft/opengcs/service/gcsutils/fs
github.com/Microsoft/opengcs/service/gcsutils/vhd
# github.com/Microsoft/opengcs/service/gcsutils/vhd
src/github.com/Microsoft/opengcs/service/gcsutils/vhd/fixed_vhd_header.go:160:24: constant 136899993600 overflows int
github.com/vishvananda/netns
github.com/opencontainers/runc/libcontainer/system
...
github.com/Microsoft/opengcs/service/gcs/errors github.com/Microsoft/opengcs/service/gcs/oslayer github.com/Microsoft/opengcs/service/gcs/oslayer/mockos github.com/Microsoft/opengcs/service/gcs/oslayer/realos github.com/Microsoft/opengcs/service/gcs/prot github.com/Microsoft/opengcs/service/gcs/runtime github.com/Microsoft/opengcs/service/gcs/runtime/mockruntime github.com/Microsoft/opengcs/service/gcs/runtime/runc github.com/Microsoft/opengcs/service/gcs/stdio github.com/Microsoft/opengcs/service/gcs/transport github.com/Microsoft/opengcs/service/gcsutils/fs github.com/Microsoft/opengcs/service/gcsutils/gcstools github.com/Microsoft/opengcs/service/gcsutils/gcstools/commoncli github.com/Microsoft/opengcs/service/gcsutils/libtar2vhd github.com/Microsoft/opengcs/service/gcsutils/remotefs github.com/Microsoft/opengcs/service/gcsutils/tarlib github.com/Microsoft/opengcs/service/gcsutils/vhd github.com/Microsoft/opengcs/service/libs/commonutils returned exit code 2
debian/rules:4: recipe for target 'build-arch' failed
make: *** [build-arch] Error 2
dpkg-buildpackage: error: debian/rules build-arch subprocess returned exit status 2
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