Reorganize packages

Makefile

@@ -12,11 +12,11 @@ build/tgo: *.go
 	@mkdir -p build
 	@go build -o build/tgo -i .
 
-build/hello.o: build/tgo hello/hello.go
-	@./build/tgo -printir -o build/hello.o hello/hello.go
+build/hello.o: build/tgo src/examples/hello/*.go
+	@./build/tgo -printir -o build/hello.o examples/hello
 
-build/runtime.o: runtime/*.c runtime/*.h
-	clang $(CFLAGS) -c -o $@ runtime/*.c
+build/runtime.o: src/runtime/*.c src/runtime/*.h
+	clang $(CFLAGS) -c -o $@ src/runtime/*.c
 
 build/hello: build/hello.o build/runtime.o
 	@clang $(CFLAGS) -o $@ $^