make test target for php5

[Chris Ross <cross+netbsd%distal.com@localhost>]

  Hi.  I noticed this evening then when a "make test" is performed  
in lang/php5, nothing [useful] happens.  There is a "make test"  
target for php5, and it's even recommended at the end of the build by  
the build process.

  If someone could simply add a:

TEST_TARGET=            test

  to the lang/php5/Makefile, that will do it.  I know there's a  
freeze, but when that thaws, this seems a useful addition.  Thanks...

                 - Chris