coreboot: introduce commonlib

Instead of reaching into src/include and re-writing code
allow for cleaner code sharing within coreboot and its
utilities. The additional thing needed at this point is
for the utilities to provide a printk() declaration within
a <console/console.h> file. That way code which uses printk()
can than be mapped properly to verbosity of utility parameters.

Change-Id: I9e46a279569733336bc0a018aed96bc924c07cdd
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/11592
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>

util/cbmem/Makefile

@@ -22,7 +22,7 @@ ROOT = ../../src
 CC     ?= $(CROSS_COMPILE)gcc
 CFLAGS ?= -O2
 CFLAGS += -Wall -Werror
-CPPFLAGS += -iquote $(ROOT)/include -iquote $(ROOT)/src/arch/x86
+CPPFLAGS += -I $(ROOT)/commonlib/include
 
 OBJS = $(PROGRAM).o