libopus: updated to 1.1

Looks like a major update, with better performances for ARM.
diff --git a/jni/libopus/sources/package_version b/jni/libopus/sources/package_version
index 92849af..8eaa996 100644
--- a/jni/libopus/sources/package_version
+++ b/jni/libopus/sources/package_version
@@ -1 +1 @@
-PACKAGE_VERSION="1.0.3"
+PACKAGE_VERSION="1.1"