IVGCVSW-4452 Add QLstm EndToEndTest

* QLstm EndToEndTest added for Ref, NEON
  and CL.

Signed-off-by: James Conroy <james.conroy@arm.com>
Change-Id: Icd2c878541f6304d726202a93d71ff3d79f6f054
diff --git a/src/backends/backendsCommon/common.mk b/src/backends/backendsCommon/common.mk
index 09783ee..450313f 100644
--- a/src/backends/backendsCommon/common.mk
+++ b/src/backends/backendsCommon/common.mk
@@ -32,6 +32,7 @@
     test/InstanceNormalizationEndToEndTestImpl.cpp \
     test/JsonPrinterTestImpl.cpp \
     test/LogSoftmaxEndToEndTestImpl.cpp \
+    test/QLstmEndToEndTestImpl.cpp \
     test/QuantizedLstmEndToEndTestImpl.cpp \
     test/SpaceToDepthEndToEndTestImpl.cpp \
     test/TensorCopyUtils.cpp \