kernel-shark-qt: Add a README file to trace-cmd/kernel-shark-qt

The README file contains instructions for building and using the Qt-based
version of KernelShark.

Signed-off-by: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
1 file changed