Move webrtc/{tools => rtc_tools}

webrtc/tools/py_event_log_analyzer/README

-This file describes how to set up and use the RTP log analyzer.
-
-First build the tool with
-
-    ninja -C out/my_build webrtc:rtp_analyzer
-
-The tool is built by default, so
-
-    ninja -C out/my_build
-
-is enough.
-
-After building, run the tool as follows:
-
-    ./out/my_build/rtp_analyzer.sh [options] <rtc event log>
-
-where <rtc event log> is a recorded RTC event log, which is stored in
-protobuf format. Such logs are generated in multiple ways, e.g. by
-Chrome through the chrome://webrtc-internals page.
-
-Options:
-  -h, --help            show this help message and exit
-  --dump_header_to_stdout
-                        print header info to stdout; similar to rtp_analyze
-  --query_sample_rate   always query user for real sample rate
-
-The script has been tested to work in python versions 3.4.1 and 2.7.6,
-but should work in all python versions.
-
-Working versions of NumPy (http://www.numpy.org/) and matplotlib
-(http://matplotlib.org/) are needed to run this tool. See this link
-with installation instructions (http://www.scipy.org/install.html).