Initial support for x86 32-bit

Cargo.lock

Cargo.toml

Makefile

src/header/mod.rs

src/ld_so/dso.rs

src/ld_so/ld_script/aarch64-unknown-redox.ld

src/ld_so/ld_script/i686-unknown-redox.ld

src/ld_so/tcb.rs

src/platform/redox/extra.rs

src/platform/redox/mod.rs

src/platform/redox/ptrace.rs