[PATCH, wwwdocs, AArch64] Document issues with singleton vector types

[Marcus Shawcroft]

On 1 May 2014 17:57, Yufeng Zhang <Yufeng.Zhang@arm.com> wrote:

> "On AArch64, the singleton vector types int64x1_t, uint64x1_t and
> float64x1_t exported by arm_neon.h are defined to be the same as their
> base types.  This results in incorrect application of parameter passing
> rules to arguments of types int64x1_t and uint64x1_t, with respect to
> the AAPCS64 ABI specification.  In addition, names of C++ functions with
> parameters of these types (including float64x1_t) are not mangled
> correctly.  The current typedef declarations also unintentionally
> allow implicit casting between singleton vector types and their base
> types.  These issues will be resolved in a near future release.  See
> PR60825 for more information."

Looks fine to me. Go ahead.
/Marcus