unwarminder: fix bootloader builds

Change-Id: I045a4c9639ff17c96b514996574d41f586b5bd7c
diff --git a/bootloader/bootloader.make b/bootloader/bootloader.make
index 78b8b43..f57fac0 100644
--- a/bootloader/bootloader.make
+++ b/bootloader/bootloader.make
@@ -18,15 +18,21 @@
 
 .SECONDEXPANSION:
 
+ifeq (arm,$(ARCH))
+  UNWARMINDER_LINK := -lunwarminder -L$(BUILDDIR)/lib
+else
+  UNWARMINDER_LINK :=
+endif
+
 $(BOOTLINK): $(BOOTLDS) $(CONFIGFILE)
 	$(call PRINTS,PP $(@F))
 	$(call preprocess2file,$<,$@,-DLOADADDRESS=$(LOADADDRESS))
 
-$(BUILDDIR)/bootloader.elf: $$(OBJ) $$(FIRMLIB) $$(BOOTLINK)
+$(BUILDDIR)/bootloader.elf: $$(OBJ) $$(FIRMLIB) $$(UNWARMINDER) $$(BOOTLINK)
 	$(call PRINTS,LD $(@F))$(CC) $(GCCOPTS) -Os -nostdlib -o $@ $(OBJ) \
-		$(FIRMLIB) -lgcc -L$(BUILDDIR)/firmware -T$(BOOTLINK) \
-                $(GLOBAL_LDOPTS) \
-		 -Wl,--gc-sections -Wl,-Map,$(BUILDDIR)/bootloader.map
+		$(FIRMLIB) $(UNWARMINDER_LINK) -lgcc -L$(BUILDDIR)/firmware \
+		-T$(BOOTLINK) $(GLOBAL_LDOPTS) \
+		-Wl,--gc-sections -Wl,-Map,$(BUILDDIR)/bootloader.map
 
 $(BUILDDIR)/bootloader.bin : $(BUILDDIR)/bootloader.elf
 	$(call PRINTS,OBJCOPY $(@F))$(OC) $(if $(filter yes, $(USE_ELF)), -S -x, -O binary) $< $@