gn: Generalize process_version() and move it to build/util (take #2)

remoting/host/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/util/process_version.gni")
 import("//remoting/build/config/remoting_build.gni")
 
 group("all_tests") {
   testonly = true
 
   deps = [
     ":unit_tests",
   ]
 }
 
@@ skipping 1372 matching lines @@
         "mac/me2me_preference_pane_disable.xib",
 
         #"mac/me2me_preference_pane-Info.plist",
       ]
     }
   } else {
     group("remoting_me2me_host_archive") {
     }
   }
 }