Update bmusb.

diff --git a/bmusb b/bmusb
index 4602e6f93d7e353f59ff6707a087067ed4e53b0f..9ada4d5213c6935c3dc2fdeb34938a375f817428 160000 (submodule)
--- a/bmusb
+++ b/bmusb
@@ -1 +1 @@
-Subproject commit 4602e6f93d7e353f59ff6707a087067ed4e53b0f
+Subproject commit 9ada4d5213c6935c3dc2fdeb34938a375f817428