Change ATF_REQUIRE_MSG calls to ATF_CHECK_MSG to get as many errors as possible

t_strptime:common..
- Expect the testcase body as a whole to fail. Multiple PRs will be filed to
track the issues (there are 18 check failures)

t_strptime:day..
- %EA and %OA seem to be case insensitive on FreeBSD


git-svn-id: svn+ssh://svn.freebsd.org/base/head@273025 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f