esp8266/main: Put /lib before / in sys.path.

upip will use first non-empty component in sys.path as an install path
(if MICROPYPATH envvar is not set, like it will be for baremetal targets).

esp8266/main.c

@@ -49,8 +49,8 @@ STATIC void mp_reset(void) {
     mp_init();
     mp_obj_list_init(mp_sys_path, 0);
     mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR_)); // current dir (or base dir of the script)
-    mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_));
     mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_lib));
+    mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_));
     mp_obj_list_init(mp_sys_argv, 0);
     #if MICROPY_VFS_FAT
     memset(MP_STATE_PORT(fs_user_mount), 0, sizeof(MP_STATE_PORT(fs_user_mount)));