Update libcxx tests #458

Job	Run time
build-and-test (3.6, Release, -std=c++11 -Werror -msse2, 20.04)	4m 9s
build-and-test (3.6, Release, -std=c++11 -Werror -fno-rtti -DMOMO_USE_SAFE_MAP_BRACKETS -DMOMO_US...	3m 56s
build-and-test (4.0, Release, -std=c++14 -Werror -msse2, 20.04)	5m 55s
build-and-test (5.0, Release, -std=c++17 -Werror -msse2, 20.04)	5m 50s
build-and-test (6.0, Release, -std=c++17 -Werror -msse2, 20.04)	6m 29s
build-and-test (7, Release, -std=c++17 -Werror -msse2, 20.04)	5m 55s
build-and-test (8, Release, -std=c++17 -Werror -msse2 -DLIBCPP_TEST_DEDUCTION_GUIDES, 20.04)	6m 27s
build-and-test (9, Release, -std=c++17 -Werror -msse2 -DLIBCPP_TEST_DEDUCTION_GUIDES, 20.04)	6m 27s
build-and-test (10, Release, -std=c++20 -Werror -msse2 -DLIBCPP_TEST_DEDUCTION_GUIDES, 20.04)	6m 58s
build-and-test (11, Release, -std=c++20 -Werror -msse2 -DLIBCPP_TEST_DEDUCTION_GUIDES, 20.04)	6m 38s
build-and-test (12, Release, -std=c++20 -Werror -msse2 -DLIBCPP_TEST_DEDUCTION_GUIDES, 20.04)	6m 18s
build-and-test (13, Release, -std=c++20 -Werror -msse2 -DLIBCPP_TEST_DEDUCTION_GUIDES, 22.04)	6m 46s
build-and-test (14, Release, -std=c++20 -Werror -msse2 -DLIBCPP_TEST_DEDUCTION_GUIDES, 22.04)	7m 8s
build-and-test (15, Release, -std=c++20 -Werror -msse2 -DLIBCPP_TEST_DEDUCTION_GUIDES, 22.04)	6m 41s
build-and-test (15, Release, -std=c++20 -Werror -DLIBCPP_TEST_DEDUCTION_GUIDES -fno-rtti -DMOMO_U...	6m 58s
build-and-test (15, Debug, -std=c++20 -Werror -fsanitize=address,undefined -msse2 -DLIBCPP_TEST_D...	5m 10s
	1h 37m 45s

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