tools/adk/Makefile: little simplification using $@

Signed-off-by: Phil Sutter <phil.sutter@viprinet.com>

tools/adk/Makefile

@@ -3,14 +3,14 @@
 
 include $(TOPDIR)/rules.mk
 
-$(TOPDIR)/bin/tools:
-	@mkdir -p $(TOPDIR)/bin/tools
+${TOPDIR}/bin/tools:
+	mkdir -p $@
 
-${TOPDIR}/bin/tools/depmaker: $(TOPDIR)/bin/tools
-	$(HOSTCC) -o $(TOPDIR)/bin/tools/depmaker depmaker.c
+${TOPDIR}/bin/tools/depmaker: ${TOPDIR}/bin/tools
+	$(HOSTCC) -o $@ depmaker.c
 
-${TOPDIR}/bin/tools/pkgrebuild: $(TOPDIR)/bin/tools
-	$(HOSTCC) -o $(TOPDIR)/bin/tools/pkgrebuild pkgrebuild.c strmap.c
+${TOPDIR}/bin/tools/pkgrebuild: ${TOPDIR}/bin/tools
+	$(HOSTCC) -o $@ pkgrebuild.c strmap.c
 
 ${TOPDIR}/bin/tools/dkgetsz: ${TOPDIR}/bin/tools
 	${HOSTCC} -O2 -Wall -o $@ dkgetsz.c