update submodule

hideki · hideki · commit b50193bca47f · 2017-02-07T16:04:44.000-08:00
diff --git a/libraries/couchbase-lite-java-core b/libraries/couchbase-lite-java-core
@@ -1 +1 @@
-Subproject commit 6808fced32edb61a99b70ea7810ef46f2c8cb669
+Subproject commit b688b5ac950cb5d733271fcfad1431cca2ad50da
