[U-Boot] [PATCH] rules.mk: make sure we always create a .depend file

[Detlev Zundel <dzu@denx.de>]

Hi Wolfgang,

> There are some cases where "make depend" would always run when
> entering a directory.  This happened when both the $(SRCS) and
> $(HOSTSRCS) lists were empty (which is for example typical for the
> examples/api/ directory).  Avoid this by making sure that a ".depend"
> file gets always created, even if empty.
>
> Signed-off-by: Wolfgang Denk <wd@denx.de>

Wants-half-of-the-credits: Detlev Zundel <dzu@denx.de>

or to be more mundane

Acked-by: Detlev Zundel <dzu@denx.de>

Cheers
  Detlev

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When you  loosen yourself from  all the obvious delusions  - religion,
ideology,  Communism - you're  still left  with the  myth of  your own
goodness. Which is the final delusion.
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