build: bump libbson for various fixes.

chergert · chergert · commit 500bb09b442e · 2014-04-07T14:09:07.000-07:00
* Endian fix for date time
 * atomics work for Solaris 10 SPARC
 * allow trying to compile on gcc 3.4.3 (probably still needs work)
diff --git a/src/libbson b/src/libbson
@@ -1 +1 @@
-Subproject commit 5055b92f129317212ad3e3ab43dd966a00a65620
+Subproject commit 4bbdfdee4d9adf9bbbf680b0da3b9aa76649fedd
