Log Message:
Update sun-{jre,jdk} to 7.0.25, aka Oracle Java SE 7u25.

while here, convert Solaris support to use pkgsrc emulator framework,
or it is hard to maintain this package.

This release includes important security fixes (CVE-2013-1571) . Oracle strongly
recommends that all Java SE 7 users upgrade to this release.

XXX: I cannot test on Solaris, but want to update for security fix.
XXX: If this change broke Solaris support, please fix, or report it.