arch/x86/Makefile.inc: trivial: fix indent of informative output about bootblock

Fixes the 4th line of this sequence:
    ROMCC      generated/bootblock.inc
    GEN        generated/bootblock_inc.S
    CC         generated/bootblock.s
    CC        generated/bootblock.o
    GEN        generated/bootblock.ld

Change-Id: Ic0704b83ec9c4191e26a94e0d69cbf4c0486ceed
Signed-off-by: Daniele Forsi <dforsi@gmail.com>
Reviewed-on: http://review.coreboot.org/6466
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
1 file changed