ArmVirtPkg/ArmVirtQemu: add LinuxLoader UEFI app to ARM build

ArmVirtPkg/ArmVirtQemu: add LinuxLoader UEFI app to ARM build

The ARM build still needs an intermediate loader to boot Linux,
since ARM/Linux has no builtin UEFI boot stub (yet).

So add the LinuxLoader UEFI application to the FV, and enable
the FvSimpleFileSystemDxe driver so that we can invoke the
Linux loader from the shell, e.g.,

  Shell> linuxloader fs2:zImage -c console=ttyAMA0

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18155 6f19259b-4bc3-4df7-8a09-765794883524