build: add serial commas to messages in configure script

PR-URL: #17464
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Jon Moss <me@jonathanmoss.me>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

Author: Trott

configure

@@ -144,7 +144,7 @@ parser.add_option("--enable-vtune-profiling",
     dest="enable_vtune_profiling",
     help="Enable profiling support for Intel VTune profiler to profile "
          "JavaScript code executed in nodejs. This feature is only available "
-         "for x32, x86 and x64 architectures.")
+         "for x32, x86, and x64 architectures.")
 
 
 parser.add_option("--link-module",
@@ -841,7 +841,7 @@ def configure_node(o):
     o['variables']['node_enable_v8_vtunejit'] = b(options.enable_vtune_profiling)
   elif options.enable_vtune_profiling:
     raise Exception(
-       'The VTune profiler for JavaScript is only supported on x32, x86 and x64 '
+       'The VTune profiler for JavaScript is only supported on x32, x86, and x64 '
        'architectures.')
   else:
     o['variables']['node_enable_v8_vtunejit'] = 'false'