update nblibs

diff --git a/nblibs b/nblibs
index d541d35a35901eaf7eb2107194dce20b0daaba42..76537737d40612c13a11ac703919ee484d0f8c73 160000 (submodule)
--- a/nblibs
+++ b/nblibs
@@ -1 +1 @@
-Subproject commit d541d35a35901eaf7eb2107194dce20b0daaba42
+Subproject commit 76537737d40612c13a11ac703919ee484d0f8c73