Update shellmatta to newest version

stm-firmware/Makefile

@@ -109,10 +109,11 @@ disassemble: $(target).elf
 objcopy: $(target).bin $(target).hex
 
 mrproper: clean
-	rm -f $(target).pro
+	$(QUIET)rm -f $(target).pro
 
 clean:
-	rm -f $(target).elf $(target).bin $(target).hex $(OBJ) $(ASOBJ) $(mapfile).map $(CFILES:%.c=$(OBJDIR)/%.c.d) $(ASFILES:%.S=$(OBJDIR)/%.S.d)
+	@echo "Cleaning up derived files..."
+	$(QUIET)rm -f $(target).elf $(target).bin $(target).hex $(OBJ) $(ASOBJ) $(mapfile).map $(CFILES:%.c=$(OBJDIR)/%.c.d) $(ASFILES:%.S=$(OBJDIR)/%.S.d)
 qtproject:
 	echo -e "TEMPLATE = app\nCONFIG -= console app_bundle qt" > $(target).pro
 	echo -e "SOURCES += $(CFILES) $(ASFILES)" >> $(target).pro

stm-firmware/shellmatta

@@ -1 +1 @@
-Subproject commit 4dc6cd1e79be4fed928443b91de70699773f7084
+Subproject commit 48fcf05b7d54acc03368c90ad8cf437f302f3346