[U-Boot] kconfiglib: sync with the latest in Kconfiglib project

[Tom Rini]

On Wed, May 27, 2015 at 11:39:22AM +0900, Masahiro Yamada wrote:

> This commit imports some updates of kconfiglib.py from
> https://github.com/ulfalizer/Kconfiglib
> 
>  - Warn about and ignore the "allnoconfig_y" Kconfig option
>  - Statements in choices inherit menu/if deps
>  - Add Symbol.is_allnoconfig_y()
>  - Hint that modules are still supported despite warnings.
>  - Add warning related to get_defconfig_filename().
>  - Fix typo in docs.
>  - Allow digits in $-references to symbols.
> 
> Signed-off-by: Ulf Magnusson <ulfalizer at gmail.com>
> Signed-off-by: Philip Craig <philipjcraig at gmail.com>
> Signed-off-by: Jakub Sitnicki <jsitnicki at gmail.com>
> Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>

Applied to u-boot/master, thanks!

-- 
Tom
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