make: use the more modern wchar routines, not widec.h

*** 105,115 ****
          /* no_action_was_taken is used to print special message */
          no_action_was_taken = false;
  
          /* Copy string to make it OK to write it. */
          q = ALLOC_WC(length + 1);
!         (void) wscpy(q, p);
          /* Write the state file iff this command uses make. */
          if (call_make && command_changed) {
                  write_state_file(0, false);
          }
          make_state->stat.time = file_no_time;
--- 105,115 ----
          /* no_action_was_taken is used to print special message */
          no_action_was_taken = false;
  
          /* Copy string to make it OK to write it. */
          q = ALLOC_WC(length + 1);
!         (void) wcscpy(q, p);
          /* Write the state file iff this command uses make. */
          if (call_make && command_changed) {
                  write_state_file(0, false);
          }
          make_state->stat.time = file_no_time;