Update version to v2.0.0-rc4

Signed-off-by: Jérémie Galarneau <[email protected]>
Change-Id: Ia3ada317153a283c90841b273c78cac3bc032655

Author: jgalar

ChangeLog

@@ -1,3 +1,6 @@
+2019-11-15 babeltrace 2.0.0-rc4
+	* Update version string to match the rc4 tag
+
 2019-11-15 babeltrace 2.0.0-rc3 (National Clean Out Your Refrigerator Day)
 	* babeltrace2-source.ctf.fs(7): document the overlapping snapshot feature
 	* Revert "Notes de relâche du troisième candidat de relâche"

configure.ac

@@ -1,5 +1,5 @@
-AC_PREREQ([2.50])
-AC_INIT([babeltrace],[2.0.0-rc3],[[email protected]],[],[https://diamon.org/babeltrace])
+dnl Process this file with autoconf to produce a configure script.
+dnl
 dnl Copyright (c) 2017 EfficiOS, Inc.
 dnl
 dnl Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -29,7 +29,7 @@ AC_PREREQ([2.50])
 m4_define([bt_version_major], [2])
 m4_define([bt_version_minor], [0])
 m4_define([bt_version_patch], [0])
-m4_define([bt_version_extra], [-rc2])
+m4_define([bt_version_extra], [-rc4])
 m4_define([bt_version], bt_version_major[.]bt_version_minor[.]bt_version_patch[]bt_version_extra)
 
 AC_INIT([babeltrace], bt_version, [jeremie dot galarneau at efficios dot com], [], [https://efficios.com/babeltrace/])