games/minecraft seems to require openjdk8 now

[Dominik Wille]

Hello FreeBSD ports team,

The port games/minecraft does not work for me any longer. The simple
patch on:
http://lists.freebsd.org/pipermail/freebsd-ports-bugs/2014-April/276962.html
which just lets games/minecraft-client use openjdk8 instead of openjdk7
works fine for me. Of course the JAVA_VERSION variable should be set to
1.8+.

Thank you, Dominik