[U-Boot] Allow fw env tools to be available as library

[Tom Rini]

On Fri, Oct 30, 2015 at 02:57:04PM +0100, Stefano Babic wrote:

> Sometimes it can be useful to link the fw_ tools instead
> of having the fw_setenv/fw_printenv installed.
> Patch exports the tool as library and allowes to link it
> with own programs.
> 
> Signed-off-by: Stefano Babic <sbabic at denx.de>
> CC: Tom Rini <trini at konsulko.com>
> Reviewed-by: Tom Rini <trini at konsulko.com>

Applied to u-boot/master, thanks!

-- 
Tom
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