tests: work around MinGW/MSYS issue in fd redirections Some checks on $(AM_TESTS_FD_REDIRECT) were failing on MSYS, likely because system calls like "write(9, ...)" simply doesn't work for MinGW-compiled programs. Similar usages work for the shell scripts though, since /bin/sh is an MSYS program and thus is a lot more POSIX-ish than most MinGW-compiled programs. The best fix for this issue is to separate the checks using shell scripts as dummy test cases from the checks using compiled programs for the same purpose, and skip these latter checks on MinGW. This change fixes automake bug#10466. Report by Peter Rosin. * tests/parallel-tests-fd-redirect.test: Move checks using compiled C programs as test cases to ... * tests/parallel-tests-fd-redirect-exeext.test: ... this new test. * tests/list-of-tests.mk: Update.