[app][tests] add new memory test

-Use the VMM to allocate a large chunk of uncached physical memory
-if no VMM, allocate from heap
-Do a simple own address test then a pattern and moving inversion test

app/tests/rules.mk

@@ -14,7 +14,8 @@ MODULE_SRCS += \
 	$(LOCAL_DIR)/float.c \
 	$(LOCAL_DIR)/float_instructions.S \
 	$(LOCAL_DIR)/float_test_vec.c \
-	$(LOCAL_DIR)/fibo.c
+	$(LOCAL_DIR)/fibo.c \
+	$(LOCAL_DIR)/mem_tests.c
 
 MODULE_COMPILEFLAGS += -Wno-format