Run of multiarch-fixes for golang-github-docker-libtrust

Try this locally (using the lintian-brush package):

debcheckout golang-github-docker-libtrust
cd golang-github-docker-libtrust
apply-multiarch-hints --no-update-changelog

Merge these changes:

Diff

diff --git a/debian/control b/debian/control
index 78ad7ef..b3995eb 100644
--- a/debian/control
+++ b/debian/control
@@ -13,6 +13,7 @@ XS-Go-Import-Path: github.com/docker/libtrust
 Package: golang-github-docker-libtrust-dev
 Architecture: all
 Depends: ${misc:Depends}, ${shlibs:Depends}
+Multi-Arch: foreign
 Description: Primitives for identity and authorization
  Libtrust is library for managing authentication and authorization using public
  key cryptography.

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