Bug 1783940 - Include fonts that new chrome tests need in the reftest jar.

MANUAL PUSH: Test-only trivial fix CLOSED TREE

layout/tools/reftest/jar.mn

@@ -8,6 +8,7 @@ reftest.jar:
   content/box-shadow (../../reftests/box-shadow/*)
   content/bugs (../../reftests/bugs/*)
   content/css-display (../../reftests/css-display/*)
+  content/fonts (../../reftests/fonts/*)
   content/forms/input/file (../../reftests/forms/input/file/*)
   content/forms/input/text (../../reftests/forms/input/text/*)
   content/forms/placeholder (../../reftests/forms/placeholder/*)
@@ -23,8 +24,6 @@ reftest.jar:
   content/xul-document-load (../../reftests/xul-document-load/*)
   content/xul (../../reftests/xul/*)
   content/xul/reftest (../../xul/reftest/*)
-  content/fonts/fira (../../reftests/fonts/fira/*)
-  content/fonts/sil (../../reftests/fonts/sil/*)
   content/toolkit/reftests (../../../toolkit/content/tests/reftests/*)
   content/osx-theme (../../../toolkit/themes/osx/reftests/*)
   content/reftest.xhtml (reftest.xhtml)