Patch merged into coreboot/master: secimage: Don't link in gmp library

the following patch was just integrated into master:
commit 1db856d08aecdb3a5fb76ddee7918afc1964b395
Author: Stefan Reinauer 
Date:   Thu Jul 30 16:26:00 2015 -0700

secimage: Don't link in gmp library

secimage does not use libgmp, so don't link it in.
    (Otherwise linking fails if the library is not installed)

Change-Id: I24af21c7754ecd0109f3e86669fa34fa6991d7fe
    Signed-off-by: Stefan Reinauer 
    Reviewed-on: http://review.coreboot.org/11079
    Tested-by: build bot (Jenkins)
    Reviewed-by: Patrick Georgi

See http://review.coreboot.org/11079 for details.

-gerrit