revert back to AM_CPPFLAGS for the older automake for now
revert back to AM_CPPFLAGS for the older automake for now


kongr45gpen/bzflag-import-1,kongr45gpen/bzflag-import-1,kongr45gpen/bzflag-import-1,kongr45gpen/bzflag-import-1,kongr45gpen/bzflag-import-1,kongr45gpen/bzflag-import-1