Add CTF Writer Clock implementation

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Add CTF Writer Trace implementation

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Add CTF Event Types implementation

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>