When trying to write new bytecode, importlib was not catching the IOError
thrown if the file happened to be read-only to keep the failure silent.

Fixes issue #7187. Thanks, Dave Malcolm for the report and analysis of the
problem.
diff --git a/Misc/ACKS b/Misc/ACKS
index 7ea387b..00a4cd7 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -472,6 +472,7 @@
 Don MacMillen
 Steve Majewski
 Grzegorz Makarewicz
+Dave Malcolm
 Ken Manheimer
 Vladimir Marangozov
 David Marek