[testsuite] check for languages consistently

[Joel Brobecker]

> this time round I didn't have a java compiler available.  I'm pretty 
> certain I checked with/without before.

It's OK to go ahead and commit the patch now, as I think I understand
what piece of code you are removing was doing. It'd be nice to have
confirmation, though.

-     set errname [file rootname [file tail $srcfile]]
-     if {! [runtest_file_p $runtests $errname]} {
-         return
-     }

-- 
Joel