make: translate using gettext, rather than the unmaintainable catgets

*** 84,94 ****
                  return;
          } else {
                  depinfo_already_read = true;
          }
                                          
!         search_dir = getenv(NOCATGETS("NSE_DEP"));
          if (search_dir == NULL) {
                  return;
          }
          (void) sprintf(nse_depinfo, "%s/%s", search_dir, NSE_DEPINFO);
          fp = fopen(nse_depinfo, "r");
--- 84,94 ----
                  return;
          } else {
                  depinfo_already_read = true;
          }
                                          
!         search_dir = getenv("NSE_DEP");
          if (search_dir == NULL) {
                  return;
          }
          (void) sprintf(nse_depinfo, "%s/%s", search_dir, NSE_DEPINFO);
          fp = fopen(nse_depinfo, "r");