Add --size-check=[error|warning].

Add --size-check=[error|warning].

gas/

2011-03-16  H.J. Lu  <hongjiu.lu@intel.com>

	* as.c (show_usage): Add --size-check=.
	(parse_args): Add and handle OPTION_SIZE_CHECK.

	* as.h (flag_size_check): New.

	* config/obj-elf.c (elf_frob_symbol): Use as_bad to report
	bad .size directive only for --size-check=error.

	* doc/as.texinfo: Document --size-check=.

gas/testsuite/

2011-03-16  H.J. Lu  <hongjiu.lu@intel.com>

	* gas/i386/bad-size.d: New.
	* gas/i386/bad-size.s: Likewise.
	* gas/i386/bad-size.warn: Likewise.

	* gas/i386/i386.exp: Run bad-size for ELF targets.