Give the clang upload bots shorter names.

scripts/slave/recipes/chromium_upload_clang.py

 # Copyright 2016 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.
 
 from recipe_engine.types import freeze
 
 DEPS = [
   'depot_tools/bot_update',
   'chromium',
   'file',
   'gsutil',
   'recipe_engine/path',
   'recipe_engine/platform',
   'recipe_engine/properties',
   'recipe_engine/python',
   'recipe_engine/step',
 ]
 
 
 BUILDERS = freeze({
   'tryserver.chromium.linux': {
     'builders': {
-      'linux_chromium_clang_upload': {
+      'linux_upload_clang': {
         'chromium_config_kwargs': {
           'BUILD_CONFIG': 'Release',
           'TARGET_PLATFORM': 'linux',
           'TARGET_BITS': 64,
         },
 
         # We need this to build the Clang toolchain
         # with proper AddressSanitizer prebuilts for
         # Chrome on Android.
         'gclient_apply_config': ['android'],
       },
     },
   },
   'tryserver.chromium.mac': {
     'builders': {
-      'mac_chromium_clang_upload': {
+      'mac_upload_clang': {
         'chromium_config_kwargs': {
           'BUILD_CONFIG': 'Release',
           'TARGET_PLATFORM': 'mac',
           'TARGET_BITS': 64,
         },
       },
     },
   },
   'tryserver.chromium.win': {
     'builders': {
-      'win_chromium_clang_upload': {
+      'win_upload_clang': {
         'chromium_config_kwargs': {
           'BUILD_CONFIG': 'Release',
           'TARGET_PLATFORM': 'win',
           'TARGET_BITS': 32,
         },
       },
     },
   },
 })
 
 
 def RunSteps(api):
   _, bot_config = api.chromium.configure_bot(BUILDERS)
 
   api.bot_update.ensure_checkout(
       force=True, patch_root=bot_config.get('root_override'))
 
   api.python('download binutils',
       api.path['checkout'].join('third_party', 'binutils', 'download.py'))
 
   api.python(
       'package clang',
       api.path['checkout'].join('tools', 'clang', 'scripts', 'package.py'),
       args=['--upload'])
 
 
 def GenTests(api):
   for test in api.chromium.gen_tests_for_builders(BUILDERS):
     yield test