Fixed non-existent directory error

Makefile

@@ -7,6 +7,8 @@ OBJ = $(patsubst $(SRCD)/%.cpp,$(OBJD)/%.o,$(SRC))
 TSTD = tests
 INSTALL_PATH=/usr/local
 
+$(shell mkdir -p $(OBJD) >/dev/null)
+
 bfk: $(OBJD) $(OBJ)
 	@echo Linking: $@
 	@g++ -o bfk $(OBJ) $(LFLAGS)
@@ -15,9 +17,6 @@ $(OBJD)/%.o: $(SRCD)/%.cpp
 	@echo Compiling: $(<F)
 	@g++ $(CFLAGS) -c -o $@ $<
 
-$(OBJD):
-	@mkdir $(OBJD)
-
 $(OBJD)/%.d: $(SRCD)/%.cpp
 	@set -e; rm -f $@; \
 	g++ --std=gnu++11 -MM -MT $(OBJD)/$(*F).o $(CPPFLAGS) $< > $@.$$$$; \