add hl to travis, again

.travis.yml

@@ -89,6 +89,8 @@ matrix:
     - os: linux
       env: TEST=python
       addons: {apt: {packages: *apt_python}}
+	- os: linux
+	  env: TEST=hl
 
     #######
     # osx #

tests/unit/compile-hl.hxml

@@ -1,4 +1,4 @@
 compile-each.hxml
 -main unit.Test
--hl d:/projects/hxtools/hl/src/_main.c
--D interp
+-hl bin/unit.hl
+-D interp