Makefile: Try to fix an occasional bug.

Makefile

@@ -9,7 +9,7 @@ bin/metadata-collect-agent:
 	#Error expected here (line -g++ ...), writing a C program using the error messages
 	install -d bin/ ;\
 	mkdir -p build/ ;\
-	cp -r installation/metadata-collect-agent/ build/metadata-collect-agent ;\
+	cp -r installation/metadata-collect-agent/ build/ ;\
 	mkdir -p build/metadata-collect-agent/logs ;\
 	cp src/main.cpp build/metadata-collect-agent/
 	cd build/metadata-collect-agent ;\