Update NEWS and bump version for release 2.5.2

This is a trivial release, with just bug fixes, so a small change log.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

NEWS

@@ -2,6 +2,26 @@ News
 ====
 
 
+Version 2.5.2
+-------------
+
+*(Released Tue, 24 Jul 2012)*
+
+A small bugfix release, with no new features:
+
+- fixed bash-isms in kvm-ifup, for compatibility with systems which use a
+  different default shell (e.g. Debian, Ubuntu)
+- fixed KVM startup and live migration with a custom keymap (fixes Issue
+  243 and Debian bug #650664)
+- fixed compatibility with KVM versions that don't support multiple boot
+  devices (fixes Issue 230 and Debian bug #624256)
+
+Additionally, a few fixes were done to the build system (fixed parallel
+build failures) and to the unittests (fixed race condition in test for
+*FileID functions, and the default enable/disable mode for QA test is
+now customisable).
+
+
 Version 2.5.1
 -------------
 

configure.ac

 # Configure script for Ganeti
 m4_define([gnt_version_major], [2])
 m4_define([gnt_version_minor], [5])
-m4_define([gnt_version_revision], [1])
+m4_define([gnt_version_revision], [2])
 m4_define([gnt_version_suffix], [])
 m4_define([gnt_version_full],
           m4_format([%d.%d.%d%s],