Update Portage to support multiple binhosts.

pym/_emerge/BinpkgFetcher.py

 # Copyright 1999-2011 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 
 from _emerge.AsynchronousLock import AsynchronousLock
 from _emerge.SpawnProcess import SpawnProcess
 try:
         from urllib.parse import urlparse as urllib_parse_urlparse
 except ImportError:
         from urlparse import urlparse as urllib_parse_urlparse
 import stat
@@ skipping 39 matching lines @@
                                 os.unlink(pkg_path)
                         except OSError:
                                 pass
 
                 # urljoin doesn't work correctly with
                 # unrecognized protocols like sftp
                 if bintree._remote_has_index:
                         rel_uri = bintree._remotepkgs[pkg.cpv].get("PATH")
                         if not rel_uri:
                                 rel_uri = pkg.cpv + ".tbz2"
-                        uri = bintree._remote_base_uri.rstrip("/") + \
-                                "/" + rel_uri.lstrip("/")
+                        remote_base_uri = bintree._remotepkgs[pkg.cpv]["BASE_URI"]
+                        uri = remote_base_uri.rstrip("/") + "/" + rel_uri.lstrip("/")
                 else:
                         uri = settings["PORTAGE_BINHOST"].rstrip("/") + \
                                 "/" + pkg.pf + ".tbz2"
 
                 if pretend:
                         portage.writemsg_stdout("\n%s\n" % uri, noiselevel=-1)
                         self._set_returncode((self.pid, os.EX_OK))
                         self.wait()
                         return
 
@@ skipping 93 matching lines @@
         class AlreadyLocked(portage.exception.PortageException):
                 pass
 
         def unlock(self):
                 if self._lock_obj is None:
                         return
                 self._lock_obj.unlock()
                 self._lock_obj = None
                 self.locked = False