Update libgsm to patchlevel 16.

No real changes to the files we use. (Seems like contrary to README.version
we were already past patchlevel 13).

Also stop suppressing warnings about undefined behavior. Lying to ourselves
doesn't seem useful.

Bug: N/A
Test: builds
Change-Id: I9090720f6902e38a769405200700330951756b07
diff --git a/ChangeLog b/ChangeLog
index a3e7cb6..a95a739 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Sat Sep 17 14:50:55  2016
+
+	* Release 1.0 Patchlevel 16
+	New email addresses in the maual pages (patch 16)
+	Removed a stray .orig file (in patch 15) 
+
 Sun Apr  5  04:53:07 2009       Jutta Degener (jutta@pobox.com)
 
 	* Release 1.0 Patchlevel 13