Add stub Makefiles to allow subdir make calls

i3-nagbar/Makefile

@@ -1,35 +1,10 @@
-# Default value so one can compile i3-nagbar standalone
-TOPDIR=..
+all:
+	$(MAKE) -C .. i3-nagbar/i3-nagbar
 
-include $(TOPDIR)/common.mk
-
-CPPFLAGS += -I$(TOPDIR)/include
-
-# Depend on the object files of all source-files in src/*.c and on all header files
-FILES=$(patsubst %.c,%.o,$(wildcard *.c))
-HEADERS=$(wildcard *.h)
-
-# Depend on the specific file (.c for each .o) and on all headers
-%.o: %.c ${HEADERS}
-	echo "[i3-nagbar] CC $<"
-	$(CC) $(CPPFLAGS) $(CFLAGS) -c -o $@ $<
-
-all: i3-nagbar
-
-i3-nagbar: $(TOPDIR)/libi3/libi3.a ${FILES}
-	echo "[i3-nagbar] LINK i3-nagbar"
-	$(CC) $(LDFLAGS) -o $@ $(filter-out libi3/libi3.a,$^) $(LIBS)
-
-$(TOPDIR)/libi3/%.a: $(TOPDIR)/libi3/*.c
-	$(MAKE) -C $(TOPDIR)/libi3
-
-install: all
-	echo "[i3-nagbar] INSTALL"
-	$(INSTALL) -d -m 0755 $(DESTDIR)$(PREFIX)/bin
-	$(INSTALL) -m 0755 i3-nagbar $(DESTDIR)$(PREFIX)/bin/
+install:
+	$(MAKE) -C .. install-i3-nagbar
 
 clean:
-	rm -f *.o
+	$(MAKE) -C .. clean-i3-nagbar
 
-distclean: clean
-	rm -f i3-nagbar
+.PHONY: all install clean