Add default link to system fonts

This avoids annoying 404s to the browser if open-sans fonts are installed
If they are not installed fallback fonts will be used by the browser.

Signed-off-by: Simo Sorce <simo@redhat.com>
Reviewed-by: Patrick Uiterwijk <puiterwijk@redhat.com>

diff --git a/ui/fonts b/ui/fonts
new file mode 120000 (symlink)
index 0000000..6d01dd6
--- /dev/null
+++ b/ui/fonts
@@ -0,0 +1 @@
+/usr/share/fonts
\ No newline at end of file