- Parse the shebang line properly (use FHU::ParseArgumentsFromString
which is the same code the loader uses)
- Make native-interpreter shebang files work by deferring to the kernel
in that case (previously, they'd get executed through the loader and
it would choke on the architecture of the interpreter)
- Do not use the RootFS-prepended path when executing shebang files. The
loader will prepend that anyway when looking it up, but it needs the
bare guest path so it can pass it as an argument to the interpreter,
which (since it's emulated) will do the lookup through the RootFS.