Merge pull request #1178 from infosiftr/postgres

Update postgres to 9.5-beta2

library/postgres

@@ -17,5 +17,5 @@
 9: git://github.com/docker-library/postgres@ed23320582f4ec5b0e5e35c99d98966dacbc6ed8 9.4
 latest: git://github.com/docker-library/postgres@ed23320582f4ec5b0e5e35c99d98966dacbc6ed8 9.4
 
-9.5-beta1: git://github.com/docker-library/postgres@ed23320582f4ec5b0e5e35c99d98966dacbc6ed8 9.5
-9.5: git://github.com/docker-library/postgres@ed23320582f4ec5b0e5e35c99d98966dacbc6ed8 9.5
+9.5-beta2: git://github.com/docker-library/postgres@8a9fbcb40f13ccc7762f278b9df611cabe22d300 9.5
+9.5: git://github.com/docker-library/postgres@8a9fbcb40f13ccc7762f278b9df611cabe22d300 9.5