make: fix searchpath of generated autoconf.h
If barebox is builded out-of-tree we don't find the autogenerated
autoconf.h because we search in the srctree.

With this patch we don't get this error message:

cc1: fatal error: /[...]/barebox/include/generated/autoconf.h: No such file or directory

Signed-off-by: Silvio Fricke <silvio.fricke@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
1 parent 877a50c commit 0af79fbb6779921d3f1962773adb7fb57d3c89d4
@Silvio Fricke Silvio Fricke authored on 16 Apr 2014
Sascha Hauer committed on 23 Apr 2014
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scripts/Makefile.lib