Update to latest bmusb.

diff --git a/bmusb b/bmusb
index fbfef809541ca1910ff09a817f04a4a3baff64e3..5549bd2f3d5a20e125b0b2b2096b017348a74834 160000 (submodule)
--- a/bmusb
+++ b/bmusb
@@ -1 +1 @@
-Subproject commit fbfef809541ca1910ff09a817f04a4a3baff64e3
+Subproject commit 5549bd2f3d5a20e125b0b2b2096b017348a74834