i18n: use dummy localizations to avoid dependencies

i18n: use dummy localizations to avoid dependencies

Upstream snapd uses the github.com/ojii/gettext.go package for access to
translation catalogs. This package is currently not available in Debian
and prevents building the package. As such, replace the real
implementation with a simple dummy one that always uses the English
input strings.

Signed-off-by: Zygmunt Krynicki <me@zygoon.pl>
Signed-off-by: Maciej Borzecki <maciej.zenon.borzecki@canonical.com>
Gbp-Pq: Name 0007-i18n-use-dummy-localizations-to-avoid-dependencies.patch