tests: Free allocated memory. Reported by <deltatau@protonmail.com> via Assaf Gordon. * tests/test-astrxfrm.c (main): Free allocated memory. * tests/test-bitset.c (compare, check_attributes): Free allocated bitsets. * tests/test-filenamecat.c (main): Free allocated memory. * tests/test-freadahead.c (main): Free allocated memory and close stdin. * tests/test-freadptr.c (main): Likewise. * tests/test-freadptr2.c (main): Free allocated memory. * tests/test-freadseek.c (main): Likewise. * tests/test-gc-arcfour.c (main): Close allocated context. * tests/test-gc-arctwo.c (main): Likewise. * tests/test-gc-des.c (main): Close all allocated contexts. * tests/test-pipe-filter-gi1.c (main): Free allocated memory. * tests/test-pipe-filter-ii1.c (main): Likewise. * tests/test-posix_spawn_file_actions_addchdir.c (main): Destroy the allocated file actions. * tests/test-posix_spawn_file_actions_addclose.c (main): Likewise. * tests/test-posix_spawn_file_actions_adddup2.c (main): Likewise. * tests/test-posix_spawn_file_actions_addopen.c (main): Likewise. * tests/test-sameacls.c (main): Free allocated memory and ACLs. * tests/test-strfmon_l.c (main): Free allocated locales. * tests/test-striconveh.c (main): Free allocated iconv_t objects. * tests/uniconv/test-u8-conv-to-enc.c (main): Free allocated memory. * tests/uniconv/test-u16-conv-to-enc.c (main): Likewise. * tests/uniconv/test-u32-conv-to-enc.c (main): Likewise. * tests/unistr/test-chr.h (main): Free input32. * tests/unistr/test-strchr.h (test_strchr): Likewise.