[libpng17] Rebuilt Makefile.in, configure, etc., with autoconf-2.69

and automake-1.12.5 in the tar distributions.
diff --git a/ANNOUNCE b/ANNOUNCE
index 0f9c677..2397a25 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -59,6 +59,7 @@
     the hardware subdirectory, and add comments to pngrutil.c so that
     implementors of other optimizations will know what to do.
   Fixed cases of unquoted DESTDIR in Makefile.am.
+  Rebuilt Makefile.in, configure, etc., with autoconf-2.69 and automake-1.12.5.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
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diff --git a/CHANGES b/CHANGES
index ce36423..7d90bab 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4344,6 +4344,7 @@
     the hardware subdirectory, and add comments to pngrutil.c so that
     implementors of other optimizations will know what to do.
   Fixed cases of unquoted DESTDIR in Makefile.am.
+  Rebuilt Makefile.in, configure, etc., with autoconf-2.69 and automake-1.12.5.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit