[U-Boot] [U-Boot, v2] tools, scripts: refactor error-out statements of Python scripts

[Tom Rini]

On Sat, Aug 16, 2014 at 12:59:26AM +0900, Masahiro Yamada wrote:

> In Python, sys.exit() function can also take an object other
> than an integer.
> 
> If an integer is given to the argument, Python exits with the return
> code of it.  If a non-integer argument is given, Python outputs it
> to stderr and exits with the return code of 1.
> 
> That means,
> 
>     print >> sys.stderr, "Blah Blah"
>     sys.exit(1)
> 
> is equivalent to
> 
>     sys.exit("Blah Blah")
> 
> The latter is a useful shorthand.
> 
> Note:
> Some error messages in Buildman and Patman were output to stdout.
> But they should go to stderr.  They are also fixed by this commit.
> This is a nice side effect.
> 
> Signed-off-by: Masahiro Yamada <yamada.m at jp.panasonic.com>
> Acked-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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