[Committed][AArch64] Add support for :tlsdesc: and TLSDESC_ADR_PREL21

[Alan Modra]

On Thu, Feb 26, 2015 at 10:57:39PM +0000, Marcus Shawcroft wrote:
>  2015-02-26  Marcus Shawcroft  <marcus.shawcroft@arm.com>
>  
> +	* elfnn-aarch64.c (IS_AARCH64_TLSDESC_RELOC) BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 move.

Please fix this overly long entry, which is missing a colon and is
somewhat obscure.  The long line attracted my attention, then I
wondered what a "BFD_RELOC... move" was!  "Move BFD_RELOC... test"
would have been clearer.  Or just
	* elfnn-aarch64.c (IS_AARCH64_TLSDESC_RELOC): Reorder R_TYPE tests.

-- 
Alan Modra
Australia Development Lab, IBM