meta-evb: Add myself (Joel) as an owner

There's no current owner, and I have an interest in keeping the aspeed
evb platforms working so they can be used for testing.

Change-Id: Ic0af2f944b3822b81ac971968ab1f11fb591cf98
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/meta-evb/OWNERS b/meta-evb/OWNERS
new file mode 100644
index 0000000..8c6ced4
--- /dev/null
+++ b/meta-evb/OWNERS
@@ -0,0 +1,2 @@
+owners:
+- joel@jms.id.au