From: Bernhard Wiedemann <bwiedemann@suse.com>
Date: Tue, 8 Mar 2016 19:39:47
# PATCH-FIX-UPSTREAM

Drop build timestamps from png.
Index: putty-0.68/icons/Makefile
===================================================================
--- putty-0.68.orig/icons/Makefile
+++ putty-0.68/icons/Makefile
@@ -38,7 +38,7 @@ $(PAMS): %.pam: mkicon.py
 	./mkicon.py $(MODE) $(join $(subst -, ,$(basename $@)),_icon) $@
 
 $(PNGS) $(MONOPNGS) $(TRUEPNGS): %.png: %.pam
-	convert $< $@
+	convert -strip $< $@
 
 $(MONOPAMS): %.pam: mkicon.py
 	./mkicon.py -2 $(MODE) $(join $(subst -, ,$(subst -mono,,$(basename $@))),_icon) $@