Fix some of the testcases

simple-lib and deeply and c-dependencies still have problems.
But they were nt caused by this pull request

src/librustpkg/testsuite/pass/src/c-dependencies/pkg.rs

@@ -58,7 +58,7 @@ pub fn main() {
                                                            [~"-c"],
                                                            [~"foo.c"],
                                                            "foo");
-            let out_p = Path::new(out_path);
+            let out_p = Path::new(out_path.unwrap());
             out_p.as_str().unwrap().to_owned()
         };
         out_path

src/librustpkg/testsuite/pass/src/foo/lib.rs

@@ -8,4 +8,4 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-fn f() {}
+pub fn f() {}

src/librustpkg/testsuite/pass/src/hello-world/main.rs

@@ -19,5 +19,5 @@ The test runner should check that, after `rustpkg build hello-world`:
 */
 
 fn main() {
-    println(~"Hello world!");
+    println("Hello world!");
 }

src/librustpkg/testsuite/pass/src/install-paths/bench.rs

@@ -9,7 +9,7 @@
 // except according to those terms.
 
 #[bench]
-fn g() {
+pub fn g() {
     let mut x = 0;
     while(x < 1000) {
         x += 1;