meta-ibm: romulus: mboxd: set version wildcard

Set the wildcard for version for mboxd_%.bbappend

(From meta-ibm rev: b2e666b6d79d6253c9e7c1b5834a4ade324dabf6)

Change-Id: I5e3f76263fcb0f1ee7612370a0540da1179bd787
Signed-off-by: Patrick Venture <venture@google.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-ibm/meta-romulus/recipes-phosphor/mboxd/mboxd_%.bbappend b/meta-ibm/meta-romulus/recipes-phosphor/mboxd/mboxd_%.bbappend
new file mode 120000
index 0000000..02277c4
--- /dev/null
+++ b/meta-ibm/meta-romulus/recipes-phosphor/mboxd/mboxd_%.bbappend
@@ -0,0 +1 @@
+mboxd.bbappend
\ No newline at end of file