PATCH][GAS] aarch64: Add testcase for HCR_EL2 system register

[Nick Clifton]

Hi Przemyslaw,

> OK for master ?

Approved - please apply.

> gas/ChangeLog:
> 2020-10-16  Przemyslaw Wirkus  <przemyslaw.wirkus@arm.com>
> 
> 	* testsuite/gas/aarch64/sysreg-6.d: New test.
> 	* testsuite/gas/aarch64/sysreg-6.s: New test.

Cheers
  Nick