Update status on automake bug 13928.

configure.ac

@@ -34,11 +34,11 @@ GNUCASH_NANO_VERSION=0
 #src/backend/dbi/gnc-backend-dbi.c:gnc_dbi_load.
 GNUCASH_RESAVE_VERSION=19920
 # Initialize automake -- make sure we have at least version 1.9 Note:
-# Automake 1.14 issues a ton of warnings about subdir-objects, which
+# Automake 1.14 & 1.15 issue a ton of warnings about subdir-objects, which
 # will become the default in automake 2.0; unfortunately this option
 # is broken and prevents building without passing
 # --disable-dependency-tracking to configure, which make-distcheck
-# doesn't do. See
+# doesn't do. Fixes are in git and expected in Automake-1.16. See
 # http://lists.gnu.org/archive/html/automake/2014-04/msg00002.html and
 # http://debbugs.gnu.org/cgi/bugreport.cgi?bug=13928 for details.
 # In the meantime the best option is to use Automake 1.13 or earlier.