Patch merged into coreboot/master: 05560bf build system: avoid warning about missing .xcompile

the following patch was just integrated into master:
commit 05560bfbe083190c0d1eeb87791696f66bffb218
Author: Patrick Georgi 
Date:   Sat Jul 19 10:55:30 2014 +0200

build system: avoid warning about missing .xcompile

That file will be generated, but not before make managed
    to complain about it.
    So let's just generate it if missing - it won't hurt the
    dependency tracking some lines later which is looking at
    time stamps.

Change-Id: I615f38457eb27a8ffb4352b5234e262ee95d84ac
    Signed-off-by: Patrick Georgi 
    Reviewed-on: http://review.coreboot.org/6305
    Tested-by: build bot (Jenkins)
    Reviewed-by: Edward O'Callaghan

See http://review.coreboot.org/6305 for details.

-gerrit