certinject: Replace Git SHA1 with GPG sig

projects/certinject/config

@@ -1,6 +1,8 @@
 version: '0.0.1'
 git_url:  https://github.com/namecoin/certinject.git
-git_hash: '8b71285733f8abce7e0f6443e9ca3dc4acf6255b'
+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: