Update statedump to 3.17 nsproxy locking

This Linux upstream commit introduces locking strategy back and forth:

commit 728dba3a39c66b3d8ac889ddbe38b5b1c264aec3
Author: Eric W. Biederman <ebiederm@xmission.com>
Date:   Mon Feb 3 19:13:49 2014 -0800

    namespaces: Use task_lock and not rcu to protect nsproxy

Use the task lock starting from kernel 3.17 rather than RCU to access
the task nsproxy.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Update kvm instrumentation: compile on 3.17-rc1

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Add cscope to gitignore

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>