[gimp] Update Japanese translation

[Translations User D-L <translations src gnome org>]

commit f3972329e36984a87c7edeeb688ef39b9c6100de
Author: Ryuta Fujii <translation sicklylife jp>
Date:   Thu Jan 10 17:27:45 2019 +0000

    Update Japanese translation

 po/ja.po | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/po/ja.po b/po/ja.po
index d96afa75f1..545ffab35b 100644
--- a/po/ja.po
+++ b/po/ja.po
@@ -8550,7 +8550,7 @@ msgstr "選択範囲の境界線で塗りつぶします"
 #: ../app/actions/select-actions.c:123
 msgctxt "select-action"
 msgid "_Fill Selection Outline"
-msgstr "選択範囲の境界線で塗りつぶす"
+msgstr "選択範囲の境界線で塗りつぶす(_F)"
 
 #: ../app/actions/select-actions.c:124
 #, fuzzy