update centos images for bash vuln

library/centos

@@ -1,6 +1,6 @@
 # maintainer: The CentOS Project <[email protected]> (@CentOS)
-# Build date 20140902_1805
-latest: git://github.com/CentOS/sig-cloud-instance-images@f7732ef53029d6adfbadb7069c6666528e5c6d0e docker
-centos7: git://github.com/CentOS/sig-cloud-instance-images@f7732ef53029d6adfbadb7069c6666528e5c6d0e docker
-centos6: git://github.com/CentOS/sig-cloud-instance-images@e1ea1c01abea5f402c650caf12049a711373b27a docker
-centos5: git://github.com/CentOS/sig-cloud-instance-images@7d888ae1b0d55a893129a1039d946e42c3573afa docker
+# Build date 20140926_1219
+latest: git://github.com/CentOS/sig-cloud-instance-images@af7a1b9f8f30744360a10fe44c53a1591bef26f9 docker
+centos7: git://github.com/CentOS/sig-cloud-instance-images@af7a1b9f8f30744360a10fe44c53a1591bef26f9 docker
+centos6: git://github.com/CentOS/sig-cloud-instance-images@8717e33ea5432ecb33d7ecefe8452a973715d037 docker
+centos5: git://github.com/CentOS/sig-cloud-instance-images@2e5a9c4e8b7191b393822e4b9e98820db5638a77 docker