Replace echo -e to printf in Makefile

Makefile

@@ -110,7 +110,7 @@ unittest_no_fail_fast:
 
 disk_img:
 ifneq ($(wildcard $(DISK_IMG)),)
-	@echo -e "$(YELLOW_C)warning$(END_C): disk image \"$(DISK_IMG)\" already exists!"
+	@printf "$(YELLOW_C)warning$(END_C): disk image \"$(DISK_IMG)\" already exists!\n"
 else
 	$(call make_disk_image,fat32,$(DISK_IMG))
 endif

scripts/make/build.mk

@@ -12,7 +12,7 @@ else
 endif
 
 _cargo_build:
-	@echo -e "    $(GREEN_C)Building$(END_C) App: $(APP_NAME), Arch: $(ARCH), Platform: $(PLATFORM), Language: $(APP_LANG)"
+	@printf "    $(GREEN_C)Building$(END_C) App: $(APP_NAME), Arch: $(ARCH), Platform: $(PLATFORM), Language: $(APP_LANG)\n"
 ifeq ($(APP_LANG), rust)
 	$(call cargo_build,--manifest-path $(APP)/Cargo.toml)
 	@cp $(rust_elf) $(OUT_ELF)

scripts/make/qemu.mk

@@ -31,6 +31,6 @@ ifeq ($(GRAPHIC), n)
 endif
 
 define run_qemu
-  @echo -e "    $(CYAN_C)Running$(END_C) $(QEMU) $(qemu_args-y) $(1)"
+  @printf "    $(CYAN_C)Running$(END_C) $(QEMU) $(qemu_args-y) $(1)\n"
   @$(QEMU) $(qemu_args-y) $(1)
 endef

scripts/make/utils.mk

@@ -6,7 +6,7 @@ YELLOW_C := \033[93;1m
 END_C := \033[0m
 
 define make_disk_image_fat32
-  @echo -e "    $(GREEN_C)Creating$(END_C) FAT32 disk image \"$(1)\" ..."
+  @printf "    $(GREEN_C)Creating$(END_C) FAT32 disk image \"$(1)\" ...\n"
   @dd if=/dev/zero of=$(1) bs=1M count=64
   @mkfs.fat -F 32 $(1)
 endef

ulib/c_libax/build.mk

@@ -66,7 +66,7 @@ $(APP)/%.o: $(APP)/%.c
 	$(CC) $(CFLAGS) -c -o $@ $<
 
 $(OUT_ELF): $(app-objs) $(c_lib) $(rust_lib)
-	@echo -e "    $(CYAN_C)Linking$(END_C) $(OUT_ELF)"
+	@printf "    $(CYAN_C)Linking$(END_C) $(OUT_ELF)\n"
 	$(LD) $(LDFLAGS) $^ -o $@
 
 .PHONY: _gen_feat