docker: Build FVP into aarch64 docker image
Now that Arm have released a public build of the FVP_Base_RevC-2xAEMvA for aarch64 linux systems, add that to the aarch64 docker image, just like we do with x86_64. This brings aarch64 to feature parity with x86_64.
Note that while we are using FVP 11.20 for aarch64, we are still using 18.16 for x86_64. 11.20 is the first available release for aarch64, but a performance regression was seen with it on x86_64 so we are holding off upgrading for x86_64 until the regression is fixed.
Signed-off-by: Ryan Roberts ryan.roberts@arm.com