lttng-ust: backport patch to fix cmake-multiple-shared-libraries build error

lttng-ust: backport patch to fix cmake-multiple-shared-libraries build error

There are the following error when building doc/examples/cmake-multiple-shared-libraries:
ld: warning: liblttng-ust-common.so.1, needed by lttng-ust/2.13.8/build/src/lib/lttng-ust/.libs/liblttng-ust.so, not found (try using -rpath or -rpath-link)
ld: warning: liblttng-ust-tracepoint.so.1, needed by lttng-ust/2.13.8/build/src/lib/lttng-ust/.libs/liblttng-ust.so, not found (try using -rpath or -rpath-link)
ld: warning: liblttng-ust-common.so.1, needed by lttng-ust/2.13.8/build/src/lib/lttng-ust/.libs/liblttng-ust.so, not found (try using -rpath or -rpath-link)
ld: warning: liblttng-ust-tracepoint.so.1, needed by lttng-ust/2.13.8/build/src/lib/lttng-ust/.libs/liblttng-ust.so, not found (try using -rpath or -rpath-link)
ld: lttng-ust/2.13.8/build/src/lib/lttng-ust/.libs/liblttng-ust.so: undefined reference to `lttng_ust_common_alloc_tls'
ld: lttng-ust/2.13.8/build/src/lib/lttng-ust/.libs/liblttng-ust.so: undefined reference to `lttng_ust_urcu_after_fork_parent'
ld: lttng-ust/2.13.8/build/src/lib/lttng-ust/.libs/liblttng-ust.so: undefined reference to `lttng_ust_urcu_after_fork_child'
ld: lttng-ust/2.13.8/build/src/lib/lttng-ust/.libs/liblttng-ust.so: undefined reference to `lttng_ust_urcu_after_fork_parent'
ld: lttng-ust/2.13.8/build/src/lib/lttng-ust/.libs/liblttng-ust.so: undefined reference to `lttng_ust_tp_probe_unregister_queue_release'
ld: lttng-ust/2.13.8/build/src/lib/lttng-ust/.libs/liblttng-ust.so: undefined reference to `lttng_ust_cancelstate_disable_pop'
collect2: error: ld returned 1 exit status

This change set removes the old patch file 0001-Makefile.am-update-rpath-link.patch,
adds a new patch file 0001-Fix-Build-examples-when-rpath-is-stripped-from-in-bu.patch.

Signed-off-by: Bin Lan <bin.lan.cn@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>