issue7213: Open the pipes used by subprocesses with the FD_CLOEXEC flag from
the C code, using pipe2() when available.  Adds unittests for close_fds and
cloexec behaviors.
diff --git a/Tools/msi/msi.py b/Tools/msi/msi.py
index 2288cf3..4cebad2 100644
--- a/Tools/msi/msi.py
+++ b/Tools/msi/msi.py
@@ -1035,6 +1035,8 @@
         if dir=='xmltestdata':
             lib.glob("*.xml")
             lib.add_file("test.xml.out")
+        if dir=='subprocessdata':
+            lib.glob("*.py")
         if dir=='output':
             lib.glob("test_*")
         if dir=='sndhdrdata':