Remove errant newline from generated policy file.

When running the post_process_mac_perms script
an unneeded newline is appended to modified
mac_permissions.xml file. Use sys.stdout.write
instead which avoids any formatting when printing.

Change-Id: Ib662dab1566299467371389dc236619aec40f5ac
Signed-off-by: rpcraig <rpcraig@tycho.ncsc.mil>

tools/post_process_mac_perms

@@ -86,7 +86,7 @@ def add_leftover_certs(args):
 
     # Inline replace with new policy stanzas
     for line in fileinput.input(args.policy, inplace=True):
-      print line.replace('</policy>', mac_perms_string)
+      sys.stdout.write(line.replace('</policy>', mac_perms_string))
 
 def main(argv):
   parser = argparse.ArgumentParser(description=__doc__)