tests: event_loop: increase eplison on linux. #8429

Job	Run time
run-ubuntu-unit-tests (-DFLB_JEMALLOC=On, gcc)	12m 13s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=On, clang)	12m 17s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=Off, gcc)	11m 29s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=Off, clang)	11m 33s
run-ubuntu-unit-tests (-DFLB_SMALL=On, gcc)	11m 37s
run-ubuntu-unit-tests (-DFLB_SMALL=On, clang)	12m 45s
run-ubuntu-unit-tests (-DSANITIZE_ADDRESS=On, gcc)	11m 45s
run-ubuntu-unit-tests (-DSANITIZE_ADDRESS=On, clang)	11m 45s
run-ubuntu-unit-tests (-DSANITIZE_UNDEFINED=On, gcc)	11m 40s
run-ubuntu-unit-tests (-DSANITIZE_UNDEFINED=On, clang)	12m 0s
run-ubuntu-unit-tests (-DFLB_COVERAGE=On, gcc)	43m 18s
run-ubuntu-unit-tests (-DFLB_SANITIZE_MEMORY=On, gcc)	11m 47s
run-ubuntu-unit-tests (-DFLB_SANITIZE_MEMORY=On, clang)	11m 25s
run-ubuntu-unit-tests (-DFLB_SANITIZE_THREAD=On, gcc)	11m 30s
run-ubuntu-unit-tests (-DFLB_SANITIZE_THREAD=On, clang)	11m 21s
run-macos-unit-tests (-DFLB_JEMALLOC=Off)	13m 50s
run-macos-unit-tests (-DFLB_SANITIZE_MEMORY=On)	11m 0s
run-macos-unit-tests (-DFLB_SANITIZE_THREAD=On)	12m 29s
Unit tests (matrix)	1s
	4h 5m 45s

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