Add --with-platform to configure. Use pkglibdir instead of
pkgdatadir. This is reported by Roger Leigh.
* util/powerpc/ieee1275/grub-install.in (datadir): Removed.
(host_vendor): Likewise.
(host_os): Likewise.
(pkgdatadir): Likewise.
(platform): New variable.
(pkglibdir): Likewise.
Use PKGLIBDIR instead of PKGDATADIR.
* util/i386/pc/grub-install.in (datadir): Removed.
(host_vendor): Likewise.
(host_os): Likewise.
(pkgdatadir): Likewise.
(platform): New variable.
(pkglibdir): Likewise.
Use PKGLIBDIR instead of PKGDATADIR.
* util/powerpc/ieee1275/grub-mkimage.c (usage): Use GRUB_LIBDIR
instead of GRUB_DATADIR.
(main): Likewise.
* util/i386/pc/grub-mkimage.c (usage): Likewise.
(main): Likewise.
* util/i386/efi/grub-mkimage.c (usage): Likewise.
(main): Likewise.
* configure.ac (--with-platform): New option.
Use PLATFORM instead of HOST_VENDOR to specify a platform.
* Makefile.in: Include a makefile based on PLATFORM instead of
HOST_VENDOR.
(pkgdatadir): Not appended by the machine type.
(pkglibdir): Appended by the machine type.
(host_vendor): Removed.
(platform): New variable.
(BUILD_CPPFLAGS): Specify GRUB_LIBDIR instead of GRUB_DATADIR.
(install-local): Use PKGLIBDIR instead of PKGDATADIR.
(uninstall): Likewise.
* util/powerpc/ieee1275/grub-install.in (grubdir): Fixed partition
number regex so multidigit numbers are recognized correctly.
* loader/powerpc/ieee1275/linux.c (grub_rescue_cmd_linux): Add a
debugging message before attempting to claim memory.
(grub_rescue_cmd_initrd): Add a claim debugging message and try
multiple addresses in case of failure.
