Bugfix: avoid newline in interpreter.

By having newline in interpreter name, z3c.recipe.scripts created
bin/\npync file, and such was returned. This lead to returning
buildout:bin-directory path, which was killing buildout in next run.

networkcached.cfg

@@ -14,8 +14,7 @@ scripts =
 [pync]
 recipe = z3c.recipe.scripts
 eggs = slapos.libnetworkcache
-interpreter =
-  pync
+interpreter = pync
 executable = ${buildout:bin-directory}/pync
 
 [testnc]