Bug#802290: libsignon-glib: FTBFS on non-amd64: hardcodes x86_64-linux-gnu paths

["Aaron M. Ucko" <ucko@debian.org>]

Source: libsignon-glib
Version: 1.12-1
Severity: important
Justification: fails to build from source

Builds of libsignon-glib for architectures other than amd64 (such as
i386) have been failing:

  dh_install --list-missing
  dh_install: libsignon-glib1 missing files (usr/lib/x86_64-linux-gnu/libsignon-glib.so.1*), aborting
  debian/rules:21: recipe for target 'override_dh_install' failed

Please adjust *.files to use wildcards as appropriate rather than
hardcoding x86_64-linux-gnu.

Thanks!