Makefile.in: Use only standard options compatible with BSD install

Don't use options specific to FSF's coreutils install.

Signed-off-by: Titus von Boxberg <titus@v9g.de>
Message-Id: <51587db99510a9ec08f8.1352226968@tschetwerikow.boxberg.lan>
Patchwork-Id: 197532

 # Compute sparc-specific values

 CT_DoArchTupleValues() {

     # That's the only thing to override

     if [ "${CT_ARCH_64}" = "y" ]; then

         CT_TARGET_ARCH="${CT_ARCH}64"

     fi

 }