Fix the transient refleaks in test_zipimport_support.

Diagnosis and original patch by Florent Xicluna (flox).

Lib/test/script_helper.py

@@ -30,7 +30,8 @@ def kill_python(p):
     data = p.stdout.read()
     p.stdout.close()
     # try to cleanup the child so we don't appear to leak when running
-    # with regrtest -R.  This should be a no-op on Windows.
+    # with regrtest -R.
+    p.wait()
     subprocess._cleanup()
     return data
 

Misc/ACKS

@@ -819,6 +819,7 @@ Gordon Worley
 Thomas Wouters
 Heiko Wundram
 Doug Wyatt
+Florent Xicluna
 Ka-Ping Yee
 Bob Yodlowski
 Danny Yoo