Compilation error with sgx enabled on unix/windows

[matevz]

I'm having the following compilation error when compiling with target_family=unix and target_env=sgx flags enabled:

error[E0428]: the name `inner` is defined multiple times
   --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/time-0.1.42/src/sys.rs:351:1
    |
275 | mod inner {
    | --------- previous definition of the module `inner` here
...
351 | mod inner {
    | ^^^^^^^^^ `inner` redefined here
    |
= note: `inner` must be defined only once in the type namespace of this module

[matevz]

It seems a trivial fix is required in https://github.com/rust-lang-deprecated/time/blob/master/src/sys.rs#L350
#[cfg(unix)] -> #[cfg(all(unix, not(target_env = "sgx")))]
and in https://github.com/rust-lang-deprecated/time/blob/master/src/sys.rs#L690
#[cfg(windows)] -> #[cfg(all(windows, not(target_env = "sgx")))]