meta-phosphor: mboxd: add symlink as git

Add a symbolic link to mboxd.bb named _git.bb and sets the
preferred version for the recipe.

(From meta-phosphor rev: 998e1fdfe23d8a8512282f31d6c55ddd8327d72f)

Change-Id: I999f3510ca45a0f7d3351dda17b3d5a1bcc222f5
Signed-off-by: Patrick Venture <venture@google.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-phosphor/conf/distro/include/phosphor-defaults.inc b/meta-phosphor/conf/distro/include/phosphor-defaults.inc
index 79d6c47..72fab7b 100644
--- a/meta-phosphor/conf/distro/include/phosphor-defaults.inc
+++ b/meta-phosphor/conf/distro/include/phosphor-defaults.inc
@@ -251,3 +251,4 @@
 PREFERRED_VERSION_phosphor-state-manager = "1.0"
 PREFERRED_VERSION_phosphor-ipmi-host = "1.0"
 PREFERRED_VERSION_phosphor-dbus-monitor = "1.0"
+PREFERRED_VERSION_mboxd = "1.0"
diff --git a/meta-phosphor/recipes-phosphor/mboxd/mboxd_git.bb b/meta-phosphor/recipes-phosphor/mboxd/mboxd_git.bb
new file mode 120000
index 0000000..72426c0
--- /dev/null
+++ b/meta-phosphor/recipes-phosphor/mboxd/mboxd_git.bb
@@ -0,0 +1 @@
+mboxd.bb
\ No newline at end of file