ACUTest does not build with Embaradero C++ Builder

[BrendanSimon]

To get ACUTest to build with Embarcadero C++ Builder I had to change add test_colorize = isatty(_fileno(stdout)); as follows.

#if defined ACUTEST_UNIX__
    test_colorize__ = isatty(STDOUT_FILENO);
#elif defined ACUTEST_WIN__
 #if defined __BORLANDC__
    test_colorize__ = isatty(_fileno(stdout));
 #else
    test_colorize__ = _isatty(_fileno(stdout));
 #endif
#else
    test_colorize__ = 0;
#endif

[mity]

Could you make a PR for it?

[BrendanSimon]

PR done.

[mity]

Merged