Handle the names used in Fedora, now when Fedora includes MinGW32 in
the standard distribution.

Cleanup and centralize the Makefile system even more.
Fix a gcc 4.3 incompatibility in memdisk (definition of strlen).

Need leading ./ to run shell script in the current directory.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Search for the MinGW compiler under several names, since different
distros like to install it under different names.  What's wrong with a
simple mingw- prefix??

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Clean up the BSUBDIR/ISUBDIR separation further.  Build _bin.c files,
which are an intermediate stage toward building the installers, in the
libinstaller directory, since that directory is used by all the
installers anyway.  That also lets us get bin2c.pl out of the root.

Move source files out of the root directory; the root is a mess and
has become virtually unmaintainable.  The Syslinux core now lives in
core/; the Linux and generic utilities has moved into utils/, and
copybs.com has moved into dos/; it had to go somewhere, and it seemed
as good a place as any.

hello.exe isn't really anything we care about; clean it up on "make tidy".

Conflicts:

	extlinux/extlinux.c

--once now supported for extlinux; some infrastructure for syslinux
there as well, need implementation in all the various installers,
however.