Patch merged into coreboot/master: xcompile: crossgcc lookup in parent paths, for painless libpayload support

the following patch was just integrated into master:
commit 15dd6c2fa3b0953248a6a22b1b4b68c27b4c9c63
Author: Paul Kocialkowski 
Date:   Mon Aug 3 16:46:29 2015 +0200

xcompile: crossgcc lookup in parent paths, for painless libpayload support

libpayload is calling the xcompile script from payloads/libpayload, so the
    script never finds the path on its own and has to be fed the right XGCCPATH by
    hand.

This makes xcompile look for the parent path too, so that it can find the
    crossgcc toolchains when called from libpayload.

Change-Id: Icc41bb68e3a43810f40f03ab1eb08af07a50a3de
    Signed-off-by: Paul Kocialkowski 
    Reviewed-on: http://review.coreboot.org/11119
    Tested-by: build bot (Jenkins)
    Reviewed-by: Patrick Georgi

See http://review.coreboot.org/11119 for details.

-gerrit