[coreboot-gerrit] Patch merged into coreboot/master: Fix a build problem with power 8: use --with-system-zlib

the following patch was just integrated into master:
commit 7ee16b7348640729c48e5459ba2c9142202238fa
Author: Ronald G. Minnich 
Date:   Fri Feb 12 21:54:59 2016 +0000

Fix a build problem with power 8: use --with-system-zlib

Power 8 was once again having build issues. Adding --with-system-zlib
    fixes them. It seems the builtin one is only needed when you are going
    to build programs, and it falls apart in other cases.

Searching --with-system-zlib reveals this to be a very popular topic.

This has not broken other toolchain builds (for me); it should not for
    anyone else. Then again, this is gcc, about which I need say no more.

Change-Id: Ica9d057d88982543b5dda471cc949c31fe15932f
    Signed-off-by: Ronald G. Minnich 
    Reviewed-on: https://review.coreboot.org/13700
    Tested-by: build bot (Jenkins)
    Reviewed-by: Patrick Georgi

See https://review.coreboot.org/13700 for details.

-gerrit