Update the JNI spec link, and remove a dead link.

Also remove the duplicate copy of this file. There's a redirect in place
from the old location.

Bug: http://code.google.com/p/android/issues/detail?id=41623
Change-Id: I521b640fdef17c98582171d97214486d16e774e4
Merge "Update the JNI spec link, and remove a dead link." into jb4.2