Update for new rust

Cargo.lock

+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
 [[package]]
 name = "cfg-if"
 version = "0.1.7"

src/bin/mount.rs

@@ -88,7 +88,7 @@ fn disk_paths(paths: &mut Vec<String>) {
         Ok(entries) => for entry_res in entries {
             if let Ok(entry) = entry_res {
                 if let Ok(path) = entry.path().into_os_string().into_string() {
-                    let scheme = path.trim_left_matches(':').trim_matches('/');
+                    let scheme = path.trim_start_matches(':').trim_matches('/');
                     if scheme.starts_with("disk") {
                         println!("redoxfs: found scheme {}", scheme);
                         schemes.push(format!("{}:", scheme));