IVGCVSW-3383 - Add TfLite Parser support for L2 Normalization layer

* Added ParseL2Normalization in TfLiteParser
* Added new unit tests L2Normalization.cpp
* Added documentation for supported L2 Normalization to TensorflorLiteSupport.md

Signed-off-by: Matthew Jackson <matthew.jackson@arm.com>
Change-Id: I83ea75d1791ac8a00390aed3e5d0a7b337fcd46d
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9bc4201..aa462fb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -565,6 +565,7 @@
              src/armnnTfLiteParser/test/DepthwiseConvolution2D.cpp
              src/armnnTfLiteParser/test/DetectionPostProcess.cpp
              src/armnnTfLiteParser/test/FullyConnected.cpp
+             src/armnnTfLiteParser/test/L2Normalization.cpp
              src/armnnTfLiteParser/test/Maximum.cpp
              src/armnnTfLiteParser/test/MaxPool2D.cpp
              src/armnnTfLiteParser/test/Mean.cpp