Use style = Tag everywhere possible

src/ctype/cbindgen.toml

src/errno/cbindgen.toml

src/fcntl/cbindgen.toml

src/fenv/cbindgen.toml

src/float/cbindgen.toml

src/grp/cbindgen.toml

src/locale/cbindgen.toml

src/semaphore/cbindgen.toml

src/stdio/cbindgen.toml

src/stdlib/cbindgen.toml

src/string/cbindgen.toml

src/sys_mman/cbindgen.toml

src/sys_resource/cbindgen.toml

src/sys_time/cbindgen.toml

src/sys_utsname/cbindgen.toml

src/template/cbindgen.toml

src/time/cbindgen.toml

src/unistd/cbindgen.toml

src/wchar/cbindgen.toml

src/wctype/cbindgen.toml