inttypes.h defines format specifiers for printf which work with data types of
particular sizes. stdlib.h is currently just a passthrough to malloc.h which
has declarations of the various *alloc functions.

Add the required #define to common.h so that these printf format specifiers
will be made available.

Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
Reviewed-by: Bill Richardson <wfrichar@google.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
(Replaced with a GPL version from glibc)