[py] change toplevel.log to infer.py.log

Summary: That name doesn't make sense anymore and could be confusing.

Reviewed By: mbouaziz

Differential Revision: D8235507

fbshipit-source-id: b6a6e71

infer/lib/python/inferlib/config.py

@@ -45,7 +45,7 @@ PMD_XML_FILENAME = 'report.xml'
 IOS_CAPTURE_ERRORS = 'errors'
 IOS_BUILD_OUTPUT = 'build_output'
 
-LOG_FILE = 'toplevel.log'
+LOG_FILE = 'infer.py.log'
 
 BUCK_INFER_OUT = 'infer'