git-archimport.1: specify what kind of Arch we're talking about

Is it a CPU architecture? Is it Arch Linux? If you search for "arch
repository", nothing relevant comes up. Let's call it GNU Arch so
people can find it with search engines.

Signed-off-by: Frederick Eaton <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: Frederick Eaton

Documentation/git-archimport.txt

@@ -3,7 +3,7 @@ git-archimport(1)
 
 NAME
 ----
-git-archimport - Import an Arch repository into Git
+git-archimport - Import a GNU Arch repository into Git
 
 
 SYNOPSIS
@@ -14,7 +14,8 @@ SYNOPSIS
 
 DESCRIPTION
 -----------
-Imports a project from one or more Arch repositories. It will follow branches
+Imports a project from one or more GNU Arch repositories.
+It will follow branches
 and repositories within the namespaces defined by the <archive/branch>
 parameters supplied. If it cannot find the remote branch a merge comes from
 it will just import it as a regular commit. If it can find it, it will mark it