eal: fix build for FreeBSD

eal: fix build for FreeBSD

Recent change to rte_dump_tailq (commit 591a9d7985c1230652),
which now uses a FILE parameter causes compilation to fail under FreeBSD
and sourced to a missing include of stdio.h.

Errors:
rte_tailq.h:  unknown type name 'FILE' void rte_dump_tailq(FILE *f);
rte_memory.h: unknown type name 'FILE' void rte_dump_physmem_layout(FILE *f);

Signed-off-by: Alan Carew <alan.carew@intel.com>
Tested-by: Waterman Cao <waterman.cao@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>