MLECO-1904: Update to use latest TFLu

* Now uses seperate TFLu github repo
* Fixes to align with API changes
* Update ASR model ops and re-enable ASR inference tests
* Set default release level to release_with_logs

Signed-off-by: Richard Burton <richard.burton@arm.com>

Change-Id: I57612088985dece1413c5c00a6e442381e07dd91
diff --git a/.gitmodules b/.gitmodules
index 12a4df7..66bff3c 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,6 +1,6 @@
 [submodule "dependencies/tensorflow"]
 	path = dependencies/tensorflow
-	url = https://github.com/tensorflow/tensorflow
+	url = https://github.com/tensorflow/tflite-micro.git
 [submodule "dependencies/cmsis"]
 	path = dependencies/cmsis
 	url = https://github.com/ARM-software/CMSIS_5.git