Rename post_perf_builder_job.py -> request_build.py

Any thoughts?

BUG=

Review URL: https://codereview.chromium.org/510203002

Cr-Commit-Position: refs/heads/master@{#292534}

tools/auto_bisect/post_perf_builder_job.py → tools/auto_bisect/request_build.py

@@ -56,7 +56,7 @@ def PostTryJob(host, port, params):
   """Sends a build request to the server using the HTTP protocol.
 
   The required parameters are:
-    'revision': "src@rev", where rev is an SVN Revision to build.
+    'revision': "src@rev", where rev is a git hash or SVN revision.
     'bot': Name of builder bot to use, e.g. "win_perf_bisect_builder".
 
   Args:

tools/bisect-perf-regression.py

@@ -52,7 +52,7 @@ sys.path.append(os.path.join(os.path.dirname(__file__), 'telemetry'))
 from auto_bisect import bisect_utils
 from auto_bisect import builder
 from auto_bisect import math_utils
-from auto_bisect import post_perf_builder_job as bisect_builder
+from auto_bisect import request_build
 from auto_bisect import source_control as source_control_module
 from auto_bisect import ttest
 from telemetry.util import cloud_storage