[U-Boot] kbuild: include config.mk when auto.conf is not older than .config

[Tom Rini]

On Fri, Apr 03, 2015 at 12:30:25PM +0900, Masahiro Yamada wrote:

> Since the Kconfig conversion, config.mk has been included only when
> include/config/auto.conf is newer than the .config file.
> 
> It causes build error if both files have the same time-stamps.
> It is actually possible because EXT* file systems have a 1s time-stamp
> resolution.
> 
> The config.mk should be included when include/config/auto.conf is
> *not older* than the .config file.
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>
> Reported-by: Tom Rini <trini at konsulko.com>
> Reported-by: York Sun <yorksun at freescale.com>
> Reported-by: Stephen Warren <swarren at nvidia.com>
> Reported-by: Matthew Gerlach <mgerlach at opensource.altera.com>
> Tested-by: Stephen Warren <swarren at nvidia.com>

Great job finally root causing this Stephen and then fixing it Masahiro!

Applied to u-boot/master, thanks!

-- 
Tom
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