Modularise makefiles

mk/userspace/orbutils.mk

@@ -0,0 +1,15 @@
+orbutils: \
+	filesystem/ui/bin/browser \
+	filesystem/ui/bin/calculator \
+	filesystem/ui/bin/character_map \
+	filesystem/ui/bin/editor \
+	filesystem/ui/bin/file_manager \
+	filesystem/ui/bin/launcher \
+	filesystem/ui/bin/orblogin \
+	filesystem/ui/bin/terminal \
+	filesystem/ui/bin/viewer
+
+filesystem/ui/bin/%: programs/orbutils/Cargo.toml programs/orbutils/src/%/**.rs $(BUILD)/libstd.rlib
+	mkdir -p filesystem/ui/bin
+	$(CARGO) rustc --manifest-path $< --bin $* $(CARGOFLAGS) -o $@
+	$(STRIP) $@