Add gcc-ar, gcc-nm, gcc-ranlib

[Paolo Bonzini]

> --- /dev/null
> +++ b/gcc/lto/gcc-ar.in
> @@ -0,0 +1,18 @@
> +#!/bin/sh
> +# wrapper for ar with GCC LTO support
> +# requires binutils 2.21+
> +
> +BASE=`readlink -f $0`

Portable?

> +BINDIR=`dirname $BASE`
> +
> +if [ -x "$BINDIR/xgcc" ] ; then
> +	GCC=xgcc
> +	ARG=-B$BINDIR
> +else
> +	GCC=gcc
> +	ARG=
> +fi
> +
> +AR=${AR:-`"$BINDIR/$GCC" -print-prog-name=ar`}
> +
> +exec $AR --plugin `$BINDIR/$GCC $ARG -print-prog-name=@LTOPLUGINSONAME@` "$@"

Missing quotes around $AR, $BINDIR/$GCC and @LTOPLUGINSONAME@.

> +NM=${NM:-`"$BINDIR/$GCC" -print-prog-name=nm`}
> +
> +exec $NM --plugin `$BINDIR/$GCC $ARG -print-prog-name=@LTOPLUGINSONAME@` "$@"

Likewise.

> +AR=${AR:-`"$BINDIR/$GCC" -print-prog-name=ar`}
> +
> +exec $AR -s --plugin `$BINDIR/$GCC $ARG -print-prog-name=@LTOPLUGINSONAME@` "$@"

Likewise.

Mentions of the script in the docs would need to say that they are
scripts and so they are not necessarily available on non-POSIX
platforms.  Give the amount of duplication, it would probably have
been easiest to do in C, I still believe.

Paolo