Bug 26949: Use GitHub repository for STIX

STIX moved away from SourceForge to GitHub breaking download during Tor
Browser build; see
https://lists.torproject.org/pipermail/tor-dev/2018-July/013357.html

projects/fonts/build

@@ -13,8 +13,8 @@ mkdir -p $distdir
    END; %]
 
 [% IF c("var/linux") || c("var/osx") %]
-  unzip -o STIXv1.1.1-latex.zip -d STIX
-  cp "STIX/Fonts/fonts/opentype/public/stix/STIXMath-Regular.otf" $distdir/
+  unzip -o 2.0.0.zip -d STIX
+  cp "STIX/stixfonts-2.0.0/archive/STIXv1.1.1/Fonts/STIX-Word/STIXMath-Regular.otf" $distdir/
 [% END %]
 [% IF c("var/linux") %]
   cp NotoEmoji-Regular.ttf $distdir/

projects/fonts/config

@@ -102,6 +102,6 @@ input_files:
   - URL: https://github.com/googlei18n/noto-cjk/raw/f36eda03dfa5582a6d49abbfb5c83d0209584158/NotoSansTC-Regular.otf
     sha256sum: e6b82f7d3dab605c428161124ceb5e169cde93de632d800297b167cdd88e7baa
     enable: '[% c("var/linux") %]'
-  - URL: https://downloads.sourceforge.net/stixfonts/STIXv1.1.1-latex.zip
-    sha256sum: e3b0f712e2644438eee2d0dcd2b10b2d54f1b972039de95b2f8e800bae1adbd8
+  - URL: https://github.com/stipub/stixfonts/archive/2.0.0.zip
+    sha256sum: 4327a16797dabebedce28a9075671730e22c7f74831b24b1fb91e27faec5a235
     enable: '[% c("var/linux") || c("var/osx") %]'