Added sample with __gfx*__ macro used

Change-Id: I80a474947ea1b755082dad5329d1aff3ee78840c

samples/2_Cookbook/14_gpu_arch/Makefile

@@ -0,0 +1,20 @@
+HIP_PATH?= $(wildcard /opt/rocm/hip)
+ifeq (,$(HIP_PATH))
+	HIP_PATH=../../..
+endif
+HIPCC=$(HIP_PATH)/bin/hipcc
+
+EXE=./gpuarch
+
+.PHONY: test
+
+all: test
+
+$(EXE): gpuarch.cpp
+	$(HIPCC) $^ -o $@
+
+test: $(EXE)
+	$(EXE)
+
+clean:
+	rm -f *.o $(EXE)