message: adding text for Eta Compute ECM3531 EVB
diff: -Running The Micro Speech Example On Eta Compute's ECM3531EVB
  -
  -This code will enable you to compile and execute the Tensorflow Lite Micro Speech Example on Eta Computes's low power ECM3531 chip.
  -
  -
  -GETTING STARTED:
  -
  -1. Download the Tensorflow code from Github and follow instructions there to download other dependencies.
  -
  -2. Download the Eta Compute SDK, version 0.0.17.
  -
  -3. Install the Arm compiler arm-none-eabi-gcc, version = arm-none-eabi-gcc (GNU Tools for Arm Embedded Processors 7-2018-q2-update) 7.3.1 20180622 (release) [ARM/embedded-7-branch revision 261907]
  -
  -4. Edit the file tensorflow/lite/experimental/micro/tools/make/targets/ecm3531_makefile.inc so that the variable ETA_SDK points to the location where the Eta Compute SDK is installed, and the variable GCC_ARM points to the Arm compiler.
  -
  -5. Compile the code with the command "make -f tensorflow/lite/experimental/micro/tools/make/Makefile TARGET=ecm3531 test". This will create the executable tensorflow/lite/experimental/micro/tools/make/gen/ecm3531_cortex-m3/bin/micro_speech_test.
  -
  -6. Connect the board to the host computer, start PuTTY (Connection type = Serial, Speed = 11520, Data bits = 8, Stop bits = 1, Parity = None), and load the executable with ocd. A sample script for loading the image is provided in tensorflow/lite/experimental/micro/tools/make/targets/ecm3531/load_program.
  -
  -The following will be printed on the Uart:
  -
  -Testing TestInvoke
  -Ran successfully
  -
  -/ tests passed
  -~~~ALL TESTS PASSED~~~
  -
  -
  -
  CONTACT INFORMATION:
  Contact info@etacompute.com for more information on obtaining the Eta Compute SDK and evalution board.
  +
  +www.etacompute.com
  