windows: Enable MICROPY_PYEXEC_POSIX_FUNCTIONS.

Windows port also uses pyexec functions and needs access to the
new pyexec_str_single() and pyexec_stdin() functions.

Signed-off-by: Andrew Leech <[email protected]>

Author: pi-anl

ports/windows/mpconfigport.h

@@ -164,6 +164,9 @@
 // Enable support for compile-only mode.
 #define MICROPY_PYEXEC_COMPILE_ONLY (1)
 
+// Enable POSIX-specific pyexec functions.
+#define MICROPY_PYEXEC_POSIX_FUNCTIONS (1)
+
 #define MICROPY_ERROR_REPORTING     (MICROPY_ERROR_REPORTING_DETAILED)
 #define MICROPY_ERROR_PRINTER       (&mp_stderr_print)
 #define MICROPY_WARNINGS            (1)