build: bump libbson

Christian Hergert · Christian Hergert · commit acab23fa2c35 · 2014-06-03T11:40:07.000-04:00
diff --git a/src/libbson b/src/libbson
@@ -1 +1 @@
-Subproject commit fd4cfe0fdc8498126b3da6d756141e3722421296
+Subproject commit 613b61b85aa86356fa15be4a008a1e8706360ff5
