lttng-tools: Upgrade 2.14.0 -> 2.14.1

lttng-tools: Upgrade 2.14.0 -> 2.14.1

Remove 0001-gen-ust-events-constructor-change-rpath-to-libdir-li.patch
as the logic is included in 2.14.1 [1].

Remove 0001-eventfd.cpp-Remove-the-scope-resolution-operator.patch as
the logic is included in 2.14.1 [2].

Remove 0001-liblttng-ctl-drop-index-allocator-symbols-from-versi.patch
as the logic is included in 2.14.1 [3].

util_event_generator.sh is renamed to util_event_generator.py [4] and
the .py install logic in included as below.
  find "${B}/tests/$d" -maxdepth 1 -type f -name "*.py" \
            -exec install -t "${D}${PTEST_PATH}/tests/$d" {} +

 # ./run-ptest
 [snip]
 PASS: test_ust_data 8 - Validate UST event
 PASS: test_ust_data 9 - Create UST context
 PASS: test_ust_data 10 - Validate UST context
 PASS: test_ust_data 11 - Validate string length
 PASS: test_ust_data 12 - Create UST exclusion
 PASS: test_ust_data 13 - Create UST event with identical exclusion names fails
 PASS: test_ust_data 14 - Create UST exclusion
 PASS: test_ust_data 15 - Create UST event with different exclusion names
 PASS: test_ust_data 16 - Validate UST event and exclusion
 ============================================================================
 Testsuite summary for lttng-tools 2.14.1
 ============================================================================
 # TOTAL: 1089
 # PASS:  1089
 # SKIP:  0
 # XFAIL: 0
 # FAIL:  0
 # XPASS: 0
 # ERROR: 0

[1] https://github.com/lttng/lttng-tools/commit/409ea456e181a769fc7e4b0a44823be0bdc8b9ce
[2] https://github.com/lttng/lttng-tools/commit/e58aac43fc498e48eb0bfb871dd5b50e54a5e93e
[3] https://github.com/lttng/lttng-tools/commit/e7eaad663489f8a12568f8ca84429b6ed64dc8c5
[4] https://github.com/lttng/lttng-tools/commit/7126bceecea9ed5d981863400ee7c4ba13042871

Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>