[Qemu-arm] Will the Google Fuchsia modifications of arm qemu be added?

[theUser BL]

Google writes a new operating system with a new kernel for it.
The complete operating system is called  "Fuchsia" and the kernel was called 
"Magenta" and later renamed to "Zircon".
Here an litte overview of it:
https://fuchsia.miraheze.org/wiki/Main_Page

The Magenta/Zircon part includes not only the kernel, it have additional parts 
(like the GNU-tools of GNU/Linux).

To build Magenta/Zircon this page describes it:
https://fuchsia.googlesource.com/magenta/+/HEAD/docs/getting_started.md
The easiest way to run Magenta/Zircon in an virtual machine, is to installing 
the toolchain, which includes qemu
https://fuchsia.googlesource.com/magenta/+/HEAD/docs/qemu.md

Magenta/Zircon existing as x86_64 and arm64 versions.
Two qemus are in the toolchain: qemu-system-x86_64 and qemu-system-aarch64.
The first one is also an modified version of qemu, but I don't see any 
difference to the original qemu.
But the last one (aarch64) is really needed, to run the arm-version. The 
original qemu can't run the ARM64 Magenta/Zircon.

So, do you know, what changes they have done? And will they later be added to 
the original qemu?

Here is the source of the modified qemu:
https://fuchsia.googlesource.com/third_party/qemu/+/master
https://github.com/fuchsia-mirror/third_party-qemu

Greetings
theuserbl