* configure.host: New file, contains mapping of host configs

* configure.host:  New file, contains mapping of host configs
to host support file names for bfd, binutils, opcodes.
* configure.in:  Use it.
* i386aout.c:  Cleanup, dump TARGET_IS_LITTLE_ENDIAN_P.
* i386bsd.c:  Cleanup, reformat.
* config/i386-bsd.mt:  Comment changes.
* config/i386bsd.mh:  New file for core file support.
* hosts/i386bsd.h:  Merge changes from Peter Schauer.
* bout.c (ALIGN):  Rename to ALIGNER, since system header files
on BSD 4.4 define ALIGN (sigh!).