[cp2k] add bug number for reference

[Dominik Mierzejewski]

commit 3d30a6f793e96294c38466b78c2213a074067e3e
Author: Dominik Mierzejewski <rpm at greysector.net>
Date:   Thu Apr 18 01:08:29 2013 +0200

    add bug number for reference

 cp2k.spec |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/cp2k.spec b/cp2k.spec
index a59cd87..fccc92e 100644
--- a/cp2k.spec
+++ b/cp2k.spec
@@ -28,7 +28,7 @@ Source4: cp2k-snapshot.sh
 # use external makedepf90
 # skip compilation during regtests
 Patch0: %{name}-rpm.patch
-# fix build with gfortran-4.8
+# fix build with gfortran-4.8 (bug #913927)
 Patch1: %{name}-gfortran48.patch
 BuildRequires: atlas-devel
 # for regtests
@@ -192,7 +192,7 @@ popd
 
 %changelog
 * Wed Apr 17 2013 Dominik Mierzejewski <rpm at greysector.net> - 2.4-0.4.20130220
-- fix build with gfortran-4.8
+- fix build with gfortran-4.8 (bug #913927)
 - link with libf77blas for MPI builds to avoid undefined reference to symbol 'dgemm_'
 
 * Sun Apr 14 2013 Dominik Mierzejewski <rpm at greysector.net> - 2.4-0.3.20130220