car globals: add "used" attribute

Otherwise clang feels free to optimize away that variable
(somewhat) and revive it in a different form inside .bss.

They probably have the language lawyery excuse for why
that's perfectly legal, so let's play it safe.
(relevant URL, sorry ron: http://llvm.org/bugs/show_bug.cgi?id=9520)

Change-Id: I603312ceea7207088dd29453cc8fb8f48c31af21
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/7357
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Tested-by: build bot (Jenkins)
src: Too many terminators ';;' at end of stmts, stop Skynet

Change-Id: I3e9b7e0e5558a6942067dcea04b83fe3bccbbaf9
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/7362
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
sch: Move to implicit length patching

Change-Id: I057e7d30fa3c661e83db09e27278ce9f0bec69d4
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/7330
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Tested-by: build bot (Jenkins)