Demo/CORTEX_MPS2_QEMU_IAR_GCC add path to IMAGE and remove mapfile (#1223)

For Demo/CORTEX_MPS2_QEMU_IAR_GCC gcc Makefile:
- simplify IMAGE var to already include full path
- clean target also removes mapfile

Signed-off-by: Florian La Roche <Florian.LaRoche@gmail.com>
Co-authored-by: Gaurav-Aggarwal-AWS <33462878+aggarg@users.noreply.github.com>

FreeRTOS/Demo/CORTEX_MPS2_QEMU_IAR_GCC/build/gcc/Makefile

@@ -1,5 +1,5 @@
 OUTPUT_DIR := ./output
-IMAGE := RTOSDemo.out
+IMAGE := $(OUTPUT_DIR)/RTOSDemo.out
 
 # The directory that contains the /source and /demo sub directories.
 FREERTOS_ROOT = ./../../../..
@@ -95,27 +95,27 @@ DEP_FILES := $(SOURCE_FILES:%.c=$(OUTPUT_DIR)/%.d)
 DEP_FILES_NO_PATH = $(notdir $(DEP_FILES))
 DEP_OUTPUT = $(DEP_FILES_NO_PATH:%.d=$(OUTPUT_DIR)/%.d)
 
-all: $(OUTPUT_DIR)/$(IMAGE)
+all: $(IMAGE)
 
 %.o : %.c
 $(OUTPUT_DIR)/%.o : %.c $(OUTPUT_DIR)/%.d Makefile
 	$(CC) $(CFLAGS) -c $< -o $@
 
-$(OUTPUT_DIR)/$(IMAGE): ./mps2_m3.ld $(OBJS_OUTPUT) Makefile
+$(IMAGE): ./mps2_m3.ld $(OBJS_OUTPUT) Makefile
 	@echo ""
 	@echo ""
 	@echo "--- Final linking ---"
 	@echo ""
 	$(LD) $(OBJS_OUTPUT) $(CFLAGS) -Xlinker --gc-sections -Xlinker -T ./mps2_m3.ld \
 		-Xlinker -Map=$(OUTPUT_DIR)/RTOSDemo.map -specs=nano.specs \
-		-specs=nosys.specs -specs=rdimon.specs -o $(OUTPUT_DIR)/$(IMAGE)
-	$(SIZE) $(OUTPUT_DIR)/$(IMAGE)		
+		-specs=nosys.specs -specs=rdimon.specs -o $(IMAGE)
+	$(SIZE) $(IMAGE)
 
 $(DEP_OUTPUT):
 include $(wildcard $(DEP_OUTPUT))
 
 clean:
-	rm -f $(OUTPUT_DIR)/$(IMAGE) $(OUTPUT_DIR)/*.o $(OUTPUT_DIR)/*.d
+	rm -f $(IMAGE) $(OUTPUT_DIR)/RTOSDemo.map $(OUTPUT_DIR)/*.o $(OUTPUT_DIR)/*.d
 
 #use "make print-[VARIABLE_NAME] to print the value of a variable generated by
 #this makefile.