xz: rebase to recent minor release

Per upstream release notes:
http://www.mail-archive.com/xz-devel@tukaani.org/msg00226.html

Version: 5.2.1-1

.gitignore

@@ -1,2 +1,2 @@
 /xz-4.999.9beta.20100401git.tar.bz2
-/xz-5.2.0.tar.xz
+/xz-5.2.1.tar.xz

sources

@@ -1,2 +1,2 @@
 3aa7bbfaa2d5a87f65c23224b9016006  xz-4.999.9beta.20100401git.tar.bz2
-d87c242778fcf5ce4598de80a55ded28  xz-5.2.0.tar.xz
+b5e2dd95dc8498cea5354377ed89aa65  xz-5.2.1.tar.xz

xz.spec

@@ -5,8 +5,8 @@
 
 Summary:	LZMA compression utilities
 Name:		xz
-Version:	5.2.0
-Release:	2%{?dist}
+Version:	5.2.1
+Release:	1%{?dist}
 
 # Scripts xz{grep,diff,less,more} and symlinks (copied from gzip) are
 # GPLv2+, binaries are Public Domain (linked against LGPL getopt_long but its
@@ -173,6 +173,10 @@ LD_LIBRARY_PATH=$PWD/src/liblzma/.libs make check
 %{_mandir}/man1/*lz*
 
 %changelog
+* Fri Feb 27 2015 Pavel Raiskup <praiskup@redhat.com> - 5.2.1-1
+- bugfix rebase to 5.2.1 (rhbz#1196786), per release notes
+  http://www.mail-archive.com/xz-devel@tukaani.org/msg00226.html
+
 * Wed Feb 04 2015 Richard W.M. Jones <rjones@redhat.com> - 5.2.0-2
 - Depend on grep that contains grepconf.sh (#1189120)