More build fixes

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3406 42af7a65-404d-4744-a932-0658087f49c3
diff --git a/examples/usbserial/Makefile.host b/examples/usbserial/Makefile.host
index eeac533..8c8884b 100644
--- a/examples/usbserial/Makefile.host
+++ b/examples/usbserial/Makefile.host
@@ -58,7 +58,7 @@
 all: $(BIN)$(EXEEXT)
 
 $(BIN)$(EXEEXT): $(SRC)
-	$(HOSTCC) $(HOSTCFLAGS) $(DEFINES) $^ -o $@
+	@$(HOSTCC) $(HOSTCFLAGS) $(DEFINES) $^ -o $@
 
 clean:
 	@rm -f $(BIN) *~ .*.swp *.o