gobtcd: Use GPG-signed tag instead of Git hash

projects/gobtcd/config

@@ -1,6 +1,8 @@
-version: 0.21.0
+version: '0.22.0'
 git_url:  https://github.com/namecoin/btcd.git
-git_hash: ac482bd97741fdc736c7e1290bc8ea5282e1b08b
+git_hash: 'v[% c("version") %]-beta'
+tag_gpg_id: 1
+gpg_keyring: namecoin.gpg
 filename: '[% project %]-[% c("version") %]-[% c("var/osname") %]-[% c("var/build_id") %].tar.gz'
 
 build: '[% c("projects/go/var/build_go_lib") %]'

projects/gobtcd2/config

@@ -1,7 +1,8 @@
-# vim: filetype=yaml sw=2
 version: '[% pc("gobtcd", "version") %]'
 git_url: '[% pc("gobtcd", "git_url") %]'
 git_hash: '[% pc("gobtcd", "git_hash") %]'
+tag_gpg_id: '[% pc("gobtcd", "tag_gpg_id") %]'
+gpg_keyring: '[% pc("gobtcd", "gpg_keyring") %]'
 filename: '[% project %]-[% c("version") %]-[% c("var/osname") %]-[% c("var/build_id") %].tar.gz'
 
 build: '[% c("projects/go/var/build_go_lib") %]'