Make -name flag default to "manifest" for import cmd.

MultiPart: 2/2
Change-Id: Ie23bc5ebf4bbd37ad5f84850e367c0aa4876192f
diff --git a/jiridoc/doc.go b/jiridoc/doc.go
index 66c906d..84003ea 100644
--- a/jiridoc/doc.go
+++ b/jiridoc/doc.go
@@ -218,9 +218,8 @@
 <remote> specifies the remote manifest repository.
 
 The jiri import flags are:
- -name=
-   The name of the remote manifest project, used to disambiguate manifest
-   projects with the same remote.  Typically empty.
+ -name=manifest
+   The name of the remote manifest project.
  -out=
    The output file.  Uses $JIRI_ROOT/.jiri_manifest if unspecified.  Uses stdout
    if set to "-".