[cantarell-fonts] Fix meson build

[Nikolaus Waxweiler <nwaxweiler src gnome org>]

commit 7eab04831f03fb0983acc1edb39f4fbad775f5d4
Author: Nikolaus Waxweiler <madigens gmail com>
Date:   Sat Jan 4 10:14:18 2020 +0000

    Fix meson build

 meson.build     | 2 ++
 src/meson.build | 2 ++
 2 files changed, 4 insertions(+)
---
diff --git a/meson.build b/meson.build
index 8d534493..660e0281 100644
--- a/meson.build
+++ b/meson.build
@@ -14,6 +14,8 @@ if useprebuilt == false
     make_static_fonts = join_paths(meson.current_source_dir(), 'scripts', 'make-static-fonts.py')
     make_variable_font = join_paths(meson.current_source_dir(), 'scripts', 'make-variable-font.py')
     psautohint = find_program('psautohint')
+    tx = find_program('tx')
+    sfntedit = find_program('sfntedit')
     subdir('src')
 else
     subdir('prebuilt')
diff --git a/src/meson.build b/src/meson.build
index 236aff85..128edaac 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -23,6 +23,8 @@ custom_target(
         '@INPUT@',
         join_paths(meson.current_source_dir(), 'Cantarell.stylespace'),
         psautohint,
+        tx,
+        sfntedit,
         '@OUTPUT@'
     ],
     install: true,