[gtk-mac-integration] More permanently use "Translators:" to introduce translation comments.

[John Ralls <jralls src gnome org>]

commit 213ef20c004693f3386adbceeb155dbad0ba1438
Author: John Ralls <jralls ceridwen us>
Date:   Sun May 6 14:08:09 2018 -0400

    More permanently use "Translators:" to introduce translation comments.

 po/Makevars |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/po/Makevars b/po/Makevars
index ca5dc34..acdae90 100644
--- a/po/Makevars
+++ b/po/Makevars
@@ -8,7 +8,7 @@ subdir = po
 top_builddir = ..
 
 # These options get passed to xgettext.
-XGETTEXT_OPTIONS = --keyword=_ --keyword=N_
+XGETTEXT_OPTIONS = --keyword=_ --keyword=N_ --add-comments=Translators:
 
 # This is the copyright holder that gets inserted into the header of the
 # $(DOMAIN).pot file.  Set this to the copyright holder of the surrounding