Port the 'module/async-pipe' test to MS-Windows
These changes let the code compile and produce a valid DLL, but the test hangs. It looks like the hang is in Fdelete_process, when it closes one of the descriptors of the pipe process. In addition, this use of the pipe process cannot currently work on MS-Windows, since make-pipe-process doesn't set up the reader thread to read from the Emacs's side of the pipe, so the select emulation doesn't know there's stuff to read from that pipe. * test/data/emacs-module/mod-test.c [WINDOWSNT]: Include windows.h. (ALIGN_STACK) [!__x86_64__]: Define for 32-bit builds. (sleep_for_half_second): New function. (write_to_pipe): Declare return type differently for WINDOWSNT. Call sleep_for_half_second. (Fmod_test_async_pipe) [WINDOWSNT]: Use _beginthread as substitute for pthread_create. (invalid_finalizer): Replace non_ASCII character in a comment. * test/src/emacs-module-tests.el (module/async-pipe): Skip on MS-Windows, as the test fails and then hangs.
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