Bug#921185: picard-tools should become Architecture: amd64

[Adrian Bunk]

Package: picard-tools
Version: 2.18.25+dfsg-1
Severity: serious

The dependency libgkl-java is amd64-only, and the easiest
way to fix testing migration as well as being generally
correct (what's the point of binary-all when it is only
installable on 1 architecture?) is
  Architecture: all -> amd64
for all packages.