PKGBUILD update for lttng-modules 2.4.0

Signed-off-by: Christian Babeux <christian.babeux@0x80.ca>
PKGBUILD update for lttng-ust 2.4.0

Signed-off-by: Christian Babeux <christian.babeux@0x80.ca>
PKGBUILD update for lttng-tools 2.4.0

Signed-off-by: Christian Babeux <christian.babeux@0x80.ca>