Update clients of path.rs to use new API.

In most cases this involved removing a ~str allocations or clones
(yay), or coercing a ~str to a slice.  In a few places, I had to bind
an intermediate Path (e.g. path.pop() return values), so that it would
live long enough to support the borrowed &str.

And in a few places, where the code was actively using the property
that the old API returned ~str's, I had to put in to_owned() or
clone(); but in those cases, we're trading an allocation within the
path.rs code for one in the client code, so they neutralize each
other.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/librustpkg/path_util.rs b/src/librustpkg/path_util.rs
index af70a79f93d..cbe6c8f65c4 100644
--- a/src/librustpkg/path_util.rs
+++ b/src/librustpkg/path_util.rs
@@ -234,14 +234,14 @@ pub fn library_in_workspace(path: &Path, short_name: &str, where: Target,
                                Some(j) => {
                                    debug!("Maybe %s equals %s", f_name.slice(0, j), lib_prefix);
                                    if f_name.slice(0, j) == lib_prefix {
-                                       result_filename = Some(p_path);
+                                       result_filename = Some(p_path.clone());
                                    }
                                    break;
                                }
                                None => break
                            }
                        }
-                       _ => { f_name = f_name.slice(0, i).to_owned(); }
+                       _ => { f_name = f_name.slice(0, i); }
                  }
                }
                None => break