* toplev.c (main): Check HAVE_GETRLIMIT and HAVE_SETRLIMIT in addition

        to RLIMIT_STACK to see if we can call getrlimit and setrlimit.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@17030 138bc75d-0d04-0410-961f-82ee72b054a4