libtracefs: Documentation: Add missing documentation to meson.build

Makefile-based build uses $(wildcard libtracefs-*.txt) to
automatically find all documentation, but Meson needs explicit listing
of the source files. Recently added files were missing from the Meson
list and this commit adds them.

Link: https://lore.kernel.org/linux-trace-devel/20240725143741.2415412-1-michal.sojka@cvut.cz

Signed-off-by: Michal Sojka <michal.sojka@cvut.cz>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
1 file changed