encaya: Use GPG-signed tag instead of Git hash

projects/encaya/config

@@ -1,6 +1,8 @@
-version: '0.1'
+version: '0.1.1'
 git_url:  https://github.com/namecoin/encaya.git
-git_hash: 'fe553b2a8664654f54fd8b3673bbdc362ca27108'
+git_hash: 'v[% c("version") %]'
+tag_gpg_id: 1
+gpg_keyring: namecoin.gpg
 filename: '[% project %]-[% c("version") %]-[% c("var/osname") %]-[% c("var/build_id") %].tar.gz'
 
 var: