bug#28084: lilypond, fontforge are not reproducible

[Danny Milosavljevic]

+++ 
/gnu/store/5isa0knfahy345j3zw7yg9vzc073rfg4-lilypond-2.19.63-check/share/lilypond/2.19.63/fonts/svg/emmentaler-11.svg
       1970-01-01 01:00:01.000000000 +0100
@@ -5,7 +5,7 @@
 -->
 <svg xmlns="http://www.w3.org/2000/svg"; 
xmlns:xlink="http://www.w3.org/1999/xlink"; version="1.1">
 <metadata>
-Created by FontForge 20160404 at Sun Aug 13 21:37:49 2017
+Created by FontForge 20160404 at Sun Aug 13 21:01:36 2017
  By Nix build user

And some actual strokes are different in the svg (for example the ones for 
glyph custodes.hufnagel.u0).

Binary files *.otf are different.
Binary files *.woff are different.