pixz: new package

Add a package for pixz (pronounced pixie), a parallel, indexing version of
xz.

See https://github.com/vasi/pixz

Signed-off-by: Vincent Stehlé <vincent.stehle@laposte.net>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Tested-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
diff --git a/DEVELOPERS b/DEVELOPERS
index 7c8d7f1..209491a 100644
--- a/DEVELOPERS
+++ b/DEVELOPERS
@@ -1719,9 +1719,10 @@
 F:	package/pinentry/
 F:	package/trinity/
 
-N:	Vincent Stehlé <vincent.stehle@intel.com>
+N:	Vincent Stehlé <vincent.stehle@laposte.net>
 F:	package/i7z/
 F:	package/msr-tools/
+F:	package/pixz/
 
 N:	Vinicius Tinti <viniciustinti@gmail.com>
 F:	package/python-thrift/