[libpng16] Eliminated use of "$<" when copying $PNGLIBCONF_H_PREBUILT in

makefiles. This does not work on some versions of make; bug introduced in
libpng version 1.6.11.
diff --git a/CHANGES b/CHANGES
index 8a127cf..3a3db79 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4965,7 +4965,12 @@
   Ensure that CMakeLists.txt makes the target "lib" directory before making
     symbolic link into it (SourceForge bug report #226 by Rolf Timmermans).
 
-Version 1.6.13beta04 [August 4, 2014]
+Version 1.6.13beta04 [August 8, 2014]
+  Added opinion about the ECCN (Export Control Classification Number) for
+    libpng being EAR99 to README
+  Eliminated use of "$<" in makefiles, when copying $PNGLIBCONF_H_PREBUILT.
+    This does not work on some versions of make; bug introduced in libpng
+    version 1.6.11.
 
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