Running on Linux kernels compiled with COMPAT_BRK disabled

When run on a kernel compiled without COMPAT_BRK CMUCL segfaults, so I copied the kludge used by SBCL - check the current personality, and if necessary, enable ADDR_NO_RANDOMIZE and re-exec itself. Patch attached. -- Stelian Ionescu a.k.a. fe[nl]ix Quidquid latine dictum sit, altum videtur. http://common-lisp.net/project/iolib