fix(build): Set the submodule refs correctly

When code was moved to LF the submodule references were
not set to NNG 1.1.1 and Nanomsg 1.1.5.  This change
sets the reference points to the desired spots.

Signed-off-by: E. Scott Daniels <daniels@research.att.com>
Change-Id: I13582b6601cf58c035b9069a80a2f94ba6003d26

diff --git a/ext/nanomsg b/ext/nanomsg
index f861a7c..1749fd7 160000 (submodule)
--- a/ext/nanomsg
+++ b/ext/nanomsg
@@ -1 +1 @@
-Subproject commit f861a7c72bc90fb1f18ffeb2f2a3d1fa59dbc5dd
+Subproject commit 1749fd7b039165a91b8d556b4df18e3e632ad830

diff --git a/ext/nng b/ext/nng
index f723fa9..8a9fd80 160000 (submodule)
--- a/ext/nng
+++ b/ext/nng
@@ -1 +1 @@
-Subproject commit f723fa9655e1e7fadc1a15b94b66de674ab9fe17
+Subproject commit 8a9fd805d96201c780610b765f9e6dd9f2eda642