lib: Enable built-in LuaJIT for s390x #9346

Job	Run time
run-ubuntu-unit-tests (-DFLB_JEMALLOC=On, gcc)	12m 51s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=On, clang)	12m 46s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=Off, gcc)	12m 13s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=Off, clang)	12m 3s
run-ubuntu-unit-tests (-DFLB_SMALL=On, gcc)	12m 19s
run-ubuntu-unit-tests (-DFLB_SMALL=On, clang)	13m 5s
run-ubuntu-unit-tests (-DSANITIZE_ADDRESS=On, gcc)	12m 30s
run-ubuntu-unit-tests (-DSANITIZE_ADDRESS=On, clang)	12m 23s
run-ubuntu-unit-tests (-DSANITIZE_UNDEFINED=On, gcc)	12m 28s
run-ubuntu-unit-tests (-DSANITIZE_UNDEFINED=On, clang)	12m 37s
run-ubuntu-unit-tests (-DFLB_COVERAGE=On, gcc)	44m 47s
run-ubuntu-unit-tests (-DFLB_SANITIZE_MEMORY=On, gcc)	12m 29s
run-ubuntu-unit-tests (-DFLB_SANITIZE_MEMORY=On, clang)	12m 13s
run-ubuntu-unit-tests (-DFLB_SANITIZE_THREAD=On, gcc)	12m 13s
run-ubuntu-unit-tests (-DFLB_SANITIZE_THREAD=On, clang)	12m 3s
run-macos-unit-tests (-DFLB_JEMALLOC=Off)	12m 8s
run-macos-unit-tests (-DFLB_SANITIZE_MEMORY=On)	12m 11s
run-macos-unit-tests (-DFLB_SANITIZE_THREAD=On)	12m 14s
Unit tests (matrix)	1s
	4h 15m 34s

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