Merge pull request #2246 from lioncash/opus-fork

externals: Update opus to latest master

externals/opus

@@ -1 +1 @@
-Subproject commit b2871922a12abb49579512d604cabc471a59ad91
+Subproject commit 562f8ba555c4181e1b57e82e496e4a959b9c0193