roll conversion into gbfs-construction to make parallel make work

Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>

examples/Makefile

@@ -66,7 +66,9 @@ all: $(TARGET)
 clean:
 	$(RM) $(TARGET) $(TARGET:.gba=.elf) $(OBJS) $(OBJS:.o=.d) data.gbfs sample_bank.bin $(BIN_MODULES) *~
 
-data.gbfs: sample_bank.bin $(BIN_MODULES)
+data.gbfs: $(CONVERTER) $(MODULES)
+	$(CONVERTER) $(MODULES)
+	gbfs $@ sample_bank.bin $(BIN_MODULES)
 
 data2.gbfs: $(MODULES)
 
@@ -75,9 +77,6 @@ $(CONVERTER)::
 
 $(TARGET:.gba=.elf): $(OBJS) $(PIMPMOBILE)/lib/libpimp_gba.a
 
-$(BIN_MODULES) sample_bank.bin : $(MODULES) $(CONVERTER)
-	$(CONVERTER) $(MODULES)
-
 %.gbfs:
 	gbfs $@ $^