oraclejdk: bump to 8u25, 7u71, and 7u72

From this version, Oracle provides two versions of JDK 7.

- JDK 7u71 is a Critical Patch Update (CPU) containing security and critical bug fixes.
- JDK 7u72 is a Patch Set Update (PSU) containing fixes of the CPU as well as non-critical fixes.

They says "Oracle strongly recommends that all Java SE users upgrade to the latest CPU release available for a release family. Most users should choose the CPU release." 
http://www.oracle.com/technetwork/java/javase/downloads/cpu-psu-explained-2331472.html

`oraclejdk7` is the CPU package. I added `oraclejdk7psu` for PSU version.