java/openjdk7 port always wants diablo-jdk16 to build

[Ronald Klop]

Hi,

I saw the openjdk7 port and tried to build it. I haven jdk16 and openjdk6  
already installed, but the port always wants to build with diablo-jdk16  
and tries to install it.
I modified the Makefile to make openjdk6 the BOOTSTRAPJDKDIR in the '# if  
no valid jdk found, set dependency' part. This is still building, but  
seams to work.

This is on a 8-STABLE/amd64 of dec-29-2009.

Cheers,

Ronald.