meson: update to latest master

util/meson.build

diff --git a/util/meson.build b/util/meson.build
index e4b4c1a..59fde47 100644
--- a/util/meson.build
+++ b/util/meson.build
@@ -20,6 +20,7 @@
 hb_subset_cli_sources = [
   'hb-subset.cc',
   'options.cc',
+  'options-subset.cc',
 ]
 
 if conf.get('HAVE_GLIB', 0) == 1