[patch] [newlib, nano] Implement nano_malloc_stats

[Joey Ye]

This patch supports malloc_stats for nano-malloc.

ChangeLog:
2013/10/24  Joey Ye  <joey.ye@arm.com>

	Implement malloc_stats for nano.
	libc/stdlib/nano-mallocr.c (RONECALL): New parameter macro.
	(sbrk_start): New variable.
	(current_mallinfo, free_list): Forward declaration of data.
	(chunk): Define size as long type.
	(mallinfo): Synchronize with latest malloc.h.
	(nano_*): Forward declaration of functions.
	(get_chunk_from_ptr): Defined to static inline.
	(nano_mallinfo): Implement this function.
	(nano_malloc_stats): Implement this function.
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