[m-rev.] diff: add 13.05.2 section to NEWS file

[Julien Fischer]

Begin a section in the NEWS file for the 13.05.2 release.

NEWS:
 	Mention the recent changes to the cord module.

Julien.

diff --git a/NEWS b/NEWS
index 1f50052..b357d4e 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,13 @@
+NEWS for Mercury 13.05.2
+------------------------
+
+This is a bug-fix release.
+
+* The following functions in the standard library's cord module now use
+  constant stack space: list/1, rev_list/1, cord_list_to_cord/1 and
+  cord_list_to_list/1.
+
+
  NEWS for Mercury 13.05.1
  ------------------------