Update NEWS for 5.2.1.
diff --git a/NEWS b/NEWS
index 79813df..376abea 100644
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,20 @@
XZ Utils Release Notes
======================
+5.2.1 (2015-02-26)
+
+ * Fixed a compression-ratio regression in fast mode of LZMA1 and
+ LZMA2. The bug is present in 5.1.4beta and 5.2.0 releases.
+
+ * Fixed a portability problem in xz that affected at least OpenBSD.
+
+ * Fixed xzdiff to be compatible with FreeBSD's mktemp which differs
+ from most other mktemp implementations.
+
+ * Changed CPU core count detection to use cpuset_getaffinity() on
+ FreeBSD.
+
+
5.2.0 (2014-12-21)
Since 5.1.4beta:
