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

Drop build timestamps from png.

--- putty-0.66/icons/mkicon.py.orig	2015-11-07 10:16:40.000000000 +0000
+++ putty-0.66/icons/mkicon.py	2016-03-08 18:34:34.600917451 +0000
@@ -912,7 +912,7 @@
     assert minx >= 0 and miny >= 0 and maxx <= width and maxy <= width
 
     block = render(canvas, 0, 0, width, width)
-    p = os.popen("convert -depth 8 -size %dx%d rgba:- %s" % (width,width,fname), "w")
+    p = os.popen("convert -strip -depth 8 -size %dx%d rgba:- %s" % (width,width,fname), "w")
     assert len(block) == width
     for line in block:
         assert len(line) == width