Add uname and gethostname

Cargo.lock

Cargo.toml

src/lib.rs

src/platform/src/lib.rs

src/platform/src/linux/mod.rs

src/sys_utsname/Cargo.toml

src/sys_utsname/build.rs

src/sys_utsname/cbindgen.toml

src/sys_utsname/src/lib.rs

src/unistd/Cargo.toml

src/unistd/src/lib.rs

src/wchar/src/lib.rs

tests/.gitignore

tests/Makefile

tests/gethostname.c