Revert "libstd: Change Path::new to Path::init."

This reverts commit c54427ddfb.

Leave the #[ignores] in that were added to rustpkg tests.

Conflicts:
	src/librustc/driver/driver.rs
	src/librustc/metadata/creader.rs

src/libstd/unstable/dynamic_lib.rs

@@ -122,7 +122,7 @@ mod test {
     fn test_errors_do_not_crash() {
         // Open /dev/null as a library to get an error, and make sure
         // that only causes an error, and not a crash.
-        let path = GenericPath::init("/dev/null");
+        let path = GenericPath::new("/dev/null");
         match DynamicLibrary::open(Some(&path)) {
             Err(_) => {}
             Ok(_) => fail!("Successfully opened the empty library.")