gosafetlsa: Use GPG-signed tag instead of Git hash

projects/gosafetlsa/config

@@ -1,6 +1,8 @@
-version: '0.0.3'
+version: '0.0.4'
 git_url:  https://github.com/namecoin/safetlsa.git
-git_hash: '57e499eb021d17c99d5470c773fab1e12367971a'
+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'
 
 build: '[% c("projects/go/var/build_go_lib") %]'