0.8.18.15:

	Fix a few problems with the AMD64 merge.
	* Fix genesis of double-floats on 32-bit little-endian platforms.
        * Remove Makefile kludge for forcing shared libraries in contribs
          to use the 32-bit mode on AMD64.
        * Remove extra argument to MY-MAKE-WIRED-TN in x86-64/c-call.lisp
          (prevented using CMUCL as host, since it gives a full warning).
        * Add a NEWS entry for the new port.