obmc-phosphor-image: move license

Move the LICENSE directive to the image recipe so other recipes could
have their own license, and because this is how oe-core is organized.

(From meta-phosphor rev: 92cadf349fb2948e64e44fba73b5eba1944886e2)

Change-Id: I6cc0499b9874ac38852cde05cb44fd32f8871204
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-phosphor/recipes-phosphor/images/obmc-phosphor-image.bb b/meta-phosphor/recipes-phosphor/images/obmc-phosphor-image.bb
index 9c0f87b..a0c14ff 100644
--- a/meta-phosphor/recipes-phosphor/images/obmc-phosphor-image.bb
+++ b/meta-phosphor/recipes-phosphor/images/obmc-phosphor-image.bb
@@ -31,6 +31,8 @@
         obmc-settings-mgmt \
         "
 
+LICENSE = "Apache-2.0"
+
 inherit obmc-phosphor-image
 
 # The /etc/version file is misleading and not useful.  Remove it.