update for gpg2
This gpg2 update fixes a security issue with "key flags".
It contains a version update to 2.0.18 for other bugfixes including a buildfix with
updated version of libgcrypt in the update channel.
CVE-2013-4351: gpg2: GnuPG treats no-usage-permitted keys as all-usages-permitted
- Submitted by Wolfgang Rosenauer (wrosenauer)
Fixed bugs
bnc#840510
VUL-0: CVE-2013-4351: gpg2: GnuPG treats no-usage-permitted keys as all-usages-permitted