Sync bmusb to 0.7.1 (no real changes).

diff --git a/bmusb b/bmusb
index e85d7ee1c0541900c57dd505454289dfaab9e782..e287f28087aef9cfd6aa47acd0d283bc177a9d70 160000 (submodule)
--- a/bmusb
+++ b/bmusb
@@ -1 +1 @@
-Subproject commit e85d7ee1c0541900c57dd505454289dfaab9e782
+Subproject commit e287f28087aef9cfd6aa47acd0d283bc177a9d70