[coreboot-gerrit] Patch merged into coreboot/master: 8b5a051 xcompile: Detect clang compilers

the following patch was just integrated into master:
commit 8b5a051c3efa13da323413c8d913694d04f18c41
Author: Patrick Georgi 
Date:   Thu Jun 4 13:44:41 2015 +0200

xcompile: Detect clang compilers

This uses the availability of CONFIG_* variables in .xcompile and tests for
    compilers in xcompile so that the build system doesn't need to probe them.

Change-Id: I359ad6245d2527efa7e848a9b38f5f194744c827
    Signed-off-by: Patrick Georgi 
    Signed-off-by: Edward O'Callaghan 
    Reviewed-on: http://review.coreboot.org/10424
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/10424 for details.

-gerrit