Add README files for ctf.parser and {lttng|tmf}.help

Add README files for ctf.parser and {lttng|tmf}.help

Those plugins require special steps to build, so if somebody
hasn't read the wiki page, they can refer to these files for
the instructions.

Change-Id: Ic34f0e89491076b2e133b94bb52652336445552f
Signed-off-by: Alexandre Montplaisir <alexmonthy@voxpopuli.im>
Reviewed-on: https://git.eclipse.org/r/10718
Tested-by: Hudson CI
Reviewed-by: Bernd Hufmann <bhufmann@gmail.com>
IP-Clean: Bernd Hufmann <bhufmann@gmail.com>
Tested-by: Bernd Hufmann <bhufmann@gmail.com>
Reviewed-by: Patrick Tasse <patrick.tasse@gmail.com>
IP-Clean: Patrick Tasse <patrick.tasse@gmail.com>