Patch merged into coreboot/master: build system: remove CBFSTOOL_PRE1_OPTS

the following patch was just integrated into master:
commit 5cc0ee270c90c8eb6cec05f70ad9e133858707b3
Author: Patrick Georgi 
Date:   Mon May 2 16:28:18 2016 +0800

build system: remove CBFSTOOL_PRE1_OPTS

It isn't used anymore.

Change-Id: Ie554d1dd87ae3f55547466e484c0864e55c9d102
    Signed-off-by: Patrick Georgi 
    Reviewed-on: https://review.coreboot.org/14567
    Tested-by: build bot (Jenkins)
    Reviewed-by: Aaron Durbin 
    Reviewed-by: Furquan Shaikh

See https://review.coreboot.org/14567 for details.

-gerrit