std: fix stat struct of android (SEGV error from run-pass/stat.rs on android)

src/libstd/path.rs

@@ -128,7 +128,6 @@ pub trait GenericPath {
 #[cfg(target_os = "android")]
 mod stat {
     #[cfg(target_arch = "x86")]
-    #[cfg(target_arch = "arm")]
     pub mod arch {
         use libc;
 
@@ -158,6 +157,35 @@ mod stat {
         }
     }
 
+    #[cfg(target_arch = "arm")]
+    pub mod arch {
+        use libc;
+
+        pub fn default_stat() -> libc::stat {
+            libc::stat {
+                st_dev: 0,
+                __pad0: [0, ..4],
+                __st_ino: 0,
+                st_mode: 0,
+                st_nlink: 0,
+                st_uid: 0,
+                st_gid: 0,
+                st_rdev: 0,
+                __pad3: [0, ..4],
+                st_size: 0,
+                st_blksize: 0,
+                st_blocks: 0,
+                st_atime: 0,
+                st_atime_nsec: 0,
+                st_mtime: 0,
+                st_mtime_nsec: 0,
+                st_ctime: 0,
+                st_ctime_nsec: 0,
+                st_ino: 0
+            }
+        }
+    }
+
     #[cfg(target_arch = "mips")]
     pub mod arch {
         use libc;