arm: Add a layer license

meta-arm did not have licensing information documented.  Add it.

(From meta-arm rev: fdceaca9f7b315e9a30100672ed72f58845dd430)

Change-Id: I82529b299259cbcf78bbf7976935dd83bdad6e10
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-arm/LICENSE b/meta-arm/LICENSE
new file mode 100644
index 0000000..7cb3e43
--- /dev/null
+++ b/meta-arm/LICENSE
@@ -0,0 +1,12 @@
+Different components of meta-arm are under different licenses (a mix
+of MIT and Apache-2.0). Please see:
+
+COPYING.Apache-2.0
+COPYING.MIT (MIT)
+
+All metadata is MIT licensed unless otherwise stated. Source code
+included in tree for individual recipes is under the LICENSE stated in
+the associated recipe (.bb file) unless otherwise stated.
+
+License information for any other files is either explicitly stated
+or defaults to Apache-2.0.