pam-ipmi: Include seed data as key file

Content in the file will be used by pam_ipmisave as seed
to generate the key.

Change-Id: Ib7d71b504530d70727ae8ab703efce8fb4bc9146
Signed-off-by: Richard Marian Thomaiyar <richard.marian.thomaiyar@linux.intel.com>
diff --git a/key_file b/key_file
new file mode 100644
index 0000000..43f868a
--- /dev/null
+++ b/key_file
@@ -0,0 +1 @@
+OPENBMC=