Allow parallel_emerge to be used when network is unavailable.

parallel_emerge

Index: parallel_emerge
diff --git a/parallel_emerge b/parallel_emerge
index da2d058660ce62b570dba9af1d87aaf4675f2077..2e8f95b1c8ee481c545de37af3aa8b0cdf6c9433 100755
--- a/parallel_emerge
+++ b/parallel_emerge
@@ -1123,7 +1123,9 @@ class DepGraphGenerator(object):
       cycles = FindCycles()
       if self.rebuild:
         local_pkgs = LocalPackageDatabase()
-        remote_pkgs = RemotePackageDatabase(emerge.settings["PORTAGE_BINHOST"])
+        remote_pkgs = {}
+        if "--getbinpkg" in emerge.opts:
+          remote_pkgs = RemotePackageDatabase(emerge.settings["PORTAGE_BINHOST"])
         AutoRebuildDeps(local_pkgs, remote_pkgs, cycles)
 
     # We need to remove installed packages so that we can use the dependency