File _multibuild of Package JeOS

<multibuild>
<package>NEMO-efi.x86_64</package>
<package>NEMO-efi.aarch64</package>
<package>NEMO-rootfs.x86_64</package>
<package>NEMO-rootfs.aarch64</package>
<package>NEMO-pinephone</package>
</multibuild>