Fix meta-layer self-references in LICENSE files

Two copy/paste errors, and one that didn't get updated when the
meta-layer name changed.

Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Change-Id: I823f46a4f4c84cd0c3235ec9c1deaa3340472147
diff --git a/meta-delta/LICENSE b/meta-delta/LICENSE
index e861d79..ed83538 100644
--- a/meta-delta/LICENSE
+++ b/meta-delta/LICENSE
@@ -1,4 +1,4 @@
-Different components of meta-asrock are under different licenses (a mix
+Different components of meta-delta are under different licenses (a mix
 of MIT and Apache-2.0). Please see:
 
 COPYING.Apache-2.0