added try/finally in OpWiseCLinker.make_all to release lock

theano/gof/cc.py

@@ -818,6 +818,7 @@ class OpWiseCLinker(link.LocalLinker):
 
         # Acquire lock on compilation directory.
         get_lock()
+        try:
 
             env = self.env
             order = env.toposort()
@@ -895,6 +896,7 @@ class OpWiseCLinker(link.LocalLinker):
 
             f.allow_gc = self.allow_gc
 
+        finally:
             # Release lock on compilation directory.
             release_lock()