Patch merged into coreboot/master: util/kconfig: Fix gconfig build

the following patch was just integrated into master:
commit e1a022ade46a6b8885e52b680f790235547242d8
Author: Jonathan Neuschäfer 
Date:   Thu Jun 30 00:32:02 2016 +0200

util/kconfig: Fix gconfig build

This linker error was the problem:

build/util/kconfig/zconf.tab.o: In function `conf_read_simple':
    /home/jn/dev/coreboot/util/kconfig/confdata.c:413: undefined reference to `kconfig_warnings'
    /home/jn/dev/coreboot/util/kconfig/confdata.c:413: undefined reference to `kconfig_warnings'
    build/util/kconfig/zconf.tab.o: In function `sym_calc_value':
    /home/jn/dev/coreboot/util/kconfig/symbol.c:388: undefined reference to `kconfig_warnings'
    /home/jn/dev/coreboot/util/kconfig/symbol.c:388: undefined reference to `kconfig_warnings'
    collect2: error: ld returned 1 exit status
    /home/jn/dev/coreboot/util/kconfig/Makefile:339: recipe for target 'build/util/kconfig/gconf' failed
    make: *** [build/util/kconfig/gconf] Error 1

Change-Id: I4a667c7c15b35618fb9ad536f2be5044b8031ab4
    Signed-off-by: Jonathan Neuschäfer 
    Reviewed-on: https://review.coreboot.org/15505
    Tested-by: build bot (Jenkins)
    Reviewed-by: Idwer Vollering 
    Reviewed-by: Patrick Georgi

See https://review.coreboot.org/15505 for details.

-gerrit