IVGCVSW-2005: Pull in backend specific unit tests into Android.mk similarly as backend sources

Change-Id: Icafc644b64c591f4dc0e1560d02b806bf053a2da
diff --git a/src/backends/aclCommon/common.mk b/src/backends/aclCommon/common.mk
index 9854f6f..67ba01b 100644
--- a/src/backends/aclCommon/common.mk
+++ b/src/backends/aclCommon/common.mk
@@ -14,4 +14,11 @@
     memory/BlobMemoryPool.cpp \
     memory/OffsetLifetimeManager.cpp \
     memory/OffsetMemoryPool.cpp \
-    memory/PoolManager.cpp
\ No newline at end of file
+    memory/PoolManager.cpp
+
+# COMMON_TEST_SOURCES contains the list of files to be included
+# in the Android unit test build (armnn-tests) and it is picked
+# up by the Android.mk file in the root of ArmNN
+
+COMMON_TEST_SOURCES := \
+    test/MemCopyTests.cpp