unix: enable micropython uos extmod

SConscript.unix

@@ -127,6 +127,7 @@ SOURCE_MICROPYTHON = [
     'vendor/micropython/extmod/modutimeq.c',
     'vendor/micropython/extmod/utime_mphal.c',
     'vendor/micropython/lib/mp-readline/readline.c',
+    'vendor/micropython/ports/unix/modos.c',
     'vendor/micropython/py/argcheck.c',
     'vendor/micropython/py/asmarm.c',
     'vendor/micropython/py/asmbase.c',

embed/unix/mpconfigport.h

@@ -177,7 +177,7 @@ extern const struct _mp_print_t mp_stderr_print;
 #define MICROPY_ASYNC_KBD_INTR (1)
 
 // extern const struct _mp_obj_module_t mp_module_machine;
-// extern const struct _mp_obj_module_t mp_module_os;
+extern const struct _mp_obj_module_t mp_module_os;
 // extern const struct _mp_obj_module_t mp_module_uos_vfs;
 // extern const struct _mp_obj_module_t mp_module_uselect;
 extern const struct _mp_obj_module_t mp_module_time;
@@ -272,7 +272,7 @@ extern const struct _mp_obj_module_t mp_module_trezorutils;
   MICROPY_PY_UTIME_DEF                                                     \
   MICROPY_PY_SOCKET_DEF                                                    \
   /* { MP_ROM_QSTR(MP_QSTR_umachine), MP_ROM_PTR(&mp_module_machine) }, */ \
-  /* { MP_ROM_QSTR(MP_QSTR_uos), MP_ROM_PTR(&mp_module_os) }, */           \
+  { MP_ROM_QSTR(MP_QSTR_uos), MP_ROM_PTR(&mp_module_os) },                 \
   MICROPY_PY_UOS_VFS_DEF                                                   \
   MICROPY_PY_USELECT_DEF                                                   \
   MICROPY_PY_TERMIOS_DEF                                                   \