Update ARM mapping symbol support

[Daniel Jacobowitz]

On Sun, Aug 02, 2009 at 08:13:51PM +0100, Richard Earnshaw wrote:
> 	.code	16
> 	.type	_obstack_newchunk, %function
> _obstack_newchunk:
> 	push	{r4, r5, r6, r7, lr}
> 	.ident	"GCC: (GNU) 4.5.0 20090801 (experimental)"
> 	.code 16
> 	.align	1
> .L13:
> 	bx	r2
> 
> $ as-new test.s 
> test.s: Assembler messages:
> test.s:9: Internal error!
> Assertion failure in make_mapping_symbol
> at /home/rearnsha/gnusrc/gcc-cross/trunk/gas/config/tc-arm.c line 2491.
> Please report this bug.

Sorry; I'll look at this in the morning.

-- 
Daniel Jacobowitz
CodeSourcery