meson: convert chardev directory to Meson (tools part)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/meson.build b/meson.build
index 13b83ea..b78829c 100644
--- a/meson.build
+++ b/meson.build
@@ -454,6 +454,7 @@
                               sources: genh + version_res)
 
 subdir('io')
+subdir('chardev')
 subdir('fsdev')
 subdir('target')