WIP feat: use primordial git HEAD (future 0.2 release)

[haraldh]

usize::from(a) as _ can be transformed to a.try_into().or(Err(libc::EINVAL))?

with the not yet released primordial 0.2

Because the sgx crate still uses primordial 0.1, internal/shim-sgx/src/event.rs and internal/shim-sgx/src/handler.rs are force transmuted as a workaround for now.

Signed-off-by: Harald Hoyer [email protected]