Check libpng directly into third_party/

third_party/libpng/scripts/def.c

Index: third_party/libpng/scripts/def.c
diff --git a/third_party/libpng/scripts/def.c b/third_party/libpng/scripts/def.c
new file mode 100644
index 0000000000000000000000000000000000000000..1922497b6ab019ed6443fcddb8dc229caea79ec3
--- /dev/null
+++ b/third_party/libpng/scripts/def.c
@@ -0,0 +1,29 @@
+/* def.c - define format of libpng.def
+ *
+ * Last changed in libpng version 1.6.16 [December 22, 2014]
+ * Copyright (c) 2011-2014 Glenn Randers-Pehrson
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ */
+
+/* Write the export file header: */
+PNG_DFN ";--------------------------------------------------------------"
+PNG_DFN "; LIBPNG module definition file for OS/2"
+PNG_DFN ";--------------------------------------------------------------"
+PNG_DFN ""
+PNG_DFN "; If you give the library an explicit name one or other files"
+PNG_DFN "; may need modifying to support the new name on one or more"
+PNG_DFN "; systems."
+PNG_DFN "LIBRARY"
+PNG_DFN "OS2 DESCRIPTION "PNG image compression library""
+PNG_DFN "OS2 CODE PRELOAD MOVEABLE DISCARDABLE"
+PNG_DFN ""
+PNG_DFN "EXPORTS"
+PNG_DFN ";Version 1.6.22rc01"
+
+#define PNG_EXPORTA(ordinal, type, name, args, attributes)\
+        PNG_DFN "@" SYMBOL_PREFIX "@@" name "@"
+
+#include "../png.h"