[gimp] NEWS: keep up-to-date.

[Jehan Pagès <jehanp src gnome org>]

commit 88c5eb6318b1b90873554fbc041e35714aa5bb29
Author: Jehan <jehan girinstud io>
Date:   Tue Feb 6 03:40:48 2018 +0100

    NEWS: keep up-to-date.

 NEWS |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/NEWS b/NEWS
index bd86882..6ac9dc8 100644
--- a/NEWS
+++ b/NEWS
@@ -53,6 +53,7 @@ Core:
     version information on GIMP and its main dependencies, as well as
     the error message and backtraces, and encouraging people to make bug
     reports.
+  - Support layer masks on layer groups.
 
 Libgimp: