Rename sunos to solaris

src/libtest/lib.rs

@@ -928,7 +928,7 @@ fn get_concurrency() -> usize {
               target_os = "macos",
               target_os = "ios",
               target_os = "android",
-              target_os = "sunos"))]
+              target_os = "solaris"))]
     fn num_cpus() -> usize {
         unsafe { libc::sysconf(libc::_SC_NPROCESSORS_ONLN) as usize }
     }