Cleanup: src.ctf.lttng-live: add missing `#include <stdint.h>`

Cleanup: src.ctf.lttng-live: add missing `#include <stdint.h>`

Use stdint.h whenever only uint*_t are need and inttypes.h when
printf-like identifier are need (e.g. %PRIu64).

And reorder some #include statements.

Signed-off-by: Francis Deslauriers <francis.deslauriers@efficios.com>
Change-Id: Ic69636e4ac316a86f88ba0bdd8ad435b38db0e6a
Reviewed-on: https://review.lttng.org/c/babeltrace/+/2313