Enable presubmit pylint in build/android.

build/android/lighttpd_server.py

Index: build/android/lighttpd_server.py
diff --git a/build/android/lighttpd_server.py b/build/android/lighttpd_server.py
index 11ae794d4ade6a9d7fdbbbb286b8e724377f26fb..a5195ac815e7611c6da7717b83dede635cfc6221 100755
--- a/build/android/lighttpd_server.py
+++ b/build/android/lighttpd_server.py
@@ -64,7 +64,8 @@ class LighttpdServer(object):
   def _Mktmp(self, name):
     return os.path.join(self.temp_dir, name)
 
-  def _GetRandomPort(self):
+  @staticmethod
+  def _GetRandomPort():
     # The ports of test server is arranged in constants.py.
     return random.randint(constants.LIGHTTPD_RANDOM_PORT_FIRST,
                           constants.LIGHTTPD_RANDOM_PORT_LAST)
@@ -145,7 +146,8 @@ class LighttpdServer(object):
         break
     return (client_error or 'Timeout', server_msg)
 
-  def _KillProcessListeningOnPort(self, port):
+  @staticmethod
+  def _KillProcessListeningOnPort(port):
     """Checks if there is a process listening on port number |port| and
     terminates it if found.
 
@@ -158,7 +160,8 @@ class LighttpdServer(object):
       assert subprocess.call(['fuser', '-v', '%d/tcp' % port]) != 0, \
           'Unable to kill process listening on port %d.' % port
 
-  def _GetDefaultBaseConfig(self):
+  @staticmethod
+  def _GetDefaultBaseConfig():
     return """server.tag                  = "%(server_tag)s"
 server.modules              = ( "mod_access",
                                 "mod_accesslog",