lttng-ust: cannot find -llttng-ust-tracepoint

liblttng_ust.la should depend on liblttng-ust-tracepoint.la, otherwise
there maybe a parallel build issue when building liblttng_ust.la:

ld: cannot find -llttng-ust-tracepoint

[YOCTO #3934]

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
augeas: change SRC_URI

- replace http://augeas.net/download/${BP}.tar.gz with
http://download.augeas.net/${BP}.tar.gz

Signed-off-by: Constantin Musca <constantinx.musca@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>