linux: add include guard for linux platform

We don't support anything else, but this is probably
how things should have been from the start.

Signed-off-by: Paul Osborne <[email protected]>

Author: posborne

src/lib.rs

@@ -25,8 +25,10 @@ extern crate nix;
 
 mod ffi;
 pub mod core;
-pub mod linux;
 pub mod sensors;
 
+#[cfg(any(target_os = "linux", target_os = "android"))]
+pub mod linux;
+
 #[cfg(test)]
 pub mod mock;