[Patch GAS Doc AArch64] Fix up "Architecture Extensions" section, add "lse".

[Nick Clifton]

Hi James,

> 2016-04-06  James Greenhalgh  <james.greenhalgh@arm.com>
> 
> 	* doc/c-aarch64.texi (Architecture Extensions): Fixup table.

Thanks for the update - patch applied.

Cheers
  Nick