Update linux host to handle SIGHUP. use it to reload config.

remoting/remoting.gyp

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     # TODO(dmaclach): can we pick this up some other way? Right now it's
     # duplicated from chrome.gyp
     'chromium_code': 1,
 
@@ skipping 1446 matching lines @@
         'remoting_host_event_logger',
         'remoting_jingle_glue',
         '../base/base.gyp:base',
         '../base/base.gyp:base_i18n',
         '../media/media.gyp:media',
         '../net/net.gyp:net',
       ],
       'sources': [
         'host/branding.cc',
         'host/branding.h',
-        'host/sighup_listener_mac.cc',
-        'host/sighup_listener_mac.h',
+        'host/posix/sighup_listener.cc',
+        'host/posix/sighup_listener.h',
         'host/remoting_me2me_host.cc',
         'host/usage_stats_consent.h',
         'host/usage_stats_consent_win.cc',
         'host/curtain_mode_mac.h',
         'host/curtain_mode_mac.cc',
       ],
       'conditions': [
+        ['os_posix != 1', {
+          'sources/': [
+            ['exclude', '^host/posix/'],
+          ],
+        }],
         ['OS=="mac"', {
           'mac_bundle': 1,
           'conditions': [
             ['branding == "Chrome"', {
               'variables': {
                  'host_bundle_id': 'com.google.chrome_remote_desktop.remoting_me2me_host',
               },
             }, { # else branding!="Chrome"
               'variables': {
                 'host_bundle_id': 'org.chromium.chromoting.remoting_me2me_host',
@@ skipping 371 matching lines @@
                   '../base/allocator/allocator.gyp:allocator',
                 ],
               },
             ],
           ],
         }],
       ],  # end of 'conditions'
     },  # end of target 'remoting_unittests'
   ],  # end of targets
 }