[gimp] NEWS: add multi-page PDF export support.

[Jehan Pagès <jehanp src gnome org>]

commit 79dfc8309aa06c808ee7a5c3ac846c16e7a963ee
Author: Jehan <jehan girinstud io>
Date:   Thu Jun 15 01:19:42 2017 +0200

    NEWS: add multi-page PDF export support.

 NEWS |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/NEWS b/NEWS
index 3177a0d..638f348 100644
--- a/NEWS
+++ b/NEWS
@@ -187,6 +187,7 @@ File Formats
     * loading 2bpp, 2 planes/1bpp, 3 planes/1bpp and 4bpp images.
     * non-Black&White monochrome PCX files (any 2 colors according to
       the palette).
+  - Add support for exporting multi-page PDF from image layers.
 
 Printing