Add libstd support for Trusty targets This PR adds support for `alloc` and `std` for the Trusty targets based on the internal patches used in Android. The original patches can be seen [here](https://android.googlesource.com/toolchain/android_rust/+/refs/heads/main/patches/development/rustc-0023-Add-Trusty-OS-support-to-Rust-std.patch) and [here](https://android.googlesource.com/toolchain/android_rust/+/refs/heads/main/patches/development/rustc-0054-Add-std-os-fd-support-for-Trusty.patch). Please let me know if there's any additional context I need to add. |
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| .. | ||
| ip_addr | ||
| socket_addr | ||
| tcp | ||
| udp | ||
| ip_addr.rs | ||
| mod.rs | ||
| socket_addr.rs | ||
| tcp.rs | ||
| test.rs | ||
| udp.rs | ||