Patch merged into coreboot/master: kconfig_lint: Fix checks when running in taint mode

the following patch was just integrated into master:
commit abf7d4d7e87a4cdb7d8fb957ab1dfd367707a406
Author: Martin Roth 
Date:   Fri Feb 19 10:24:25 2016 -0700

kconfig_lint: Fix checks when running in taint mode

The builders run perl scripts in taint mode, and some of the checks
    that the kconfig lint script were running were tainted, causing
    the script to terminate early when running on the servers.

This checks to see if taint mode is enabled, and untaints the path
    if it is.  All external tools (git & grep) must be in
    /bin, /usr/bin, or /usr/local/bin.
    This also removes the check for unused kconfig files if taint mode
    is enabled.

Change-Id: I8d1e1c32275f759d085759fb5d8a6c85d4f99539
    Signed-off-by: Martin Roth 
    Reviewed-on: https://review.coreboot.org/13751
    Reviewed-by: Patrick Georgi 
    Tested-by: build bot (Jenkins)

See https://review.coreboot.org/13751 for details.

-gerrit