library/std: Set OS raw type definitions for sparc-unknown-linux-gnu

Author: glaubitz

library/std/src/os/linux/raw.rs

@@ -29,6 +29,7 @@ pub use self::arch::{blkcnt_t, blksize_t, ino_t, nlink_t, off_t, stat, time_t};
     target_arch = "x86",
     target_arch = "le32",
     target_arch = "powerpc",
+    target_arch = "sparc",
     target_arch = "arm",
     target_arch = "asmjs",
     target_arch = "wasm32"