bug#8021: bootstrap failed on solaris10

[Jim Meyering]

Jeff liu wrote:
> I was ran into a wired issue when running `bootstrap` on solaris10
> with bash-3.00,
> bash-3.00# ./bootstrap
> ./bootstrap: syntax error at line 328: `p1=$' unexpected

Try "bash ./bootstrap".
Otherwise, bootstrap uses /bin/sh, which (on that system)
doesn't know about the $(...) syntax.

> bash-3.00# uname -a
> SunOS pibroch 5.10 Generic_142910-17 i86pc i386 i86pc
>
> Coreutils is cloned from upstream, I am intend to try it on Solaris
> for sparse file copy through lseek.