Modify fix for warning from 'ar'.

src/Makefile

@@ -208,7 +208,7 @@ TARGET_CC= $(STATIC_CC)
 TARGET_STCC= $(STATIC_CC)
 TARGET_DYNCC= $(DYNAMIC_CC)
 TARGET_LD= $(CROSS)$(CC)
-TARGET_AR= $(CROSS)ar rcus 2>/dev/null
+TARGET_AR= $(CROSS)ar rcus
 TARGET_STRIP= $(CROSS)strip
 
 TARGET_LIBPATH= $(or $(PREFIX),/usr/local)/$(or $(MULTILIB),lib)
@@ -293,6 +293,7 @@ ifeq (Windows,$(TARGET_SYS))
   TARGET_XSHLDFLAGS= -shared
   TARGET_DYNXLDOPTS=
 else
+  TARGET_AR+= 2>/dev/null
 ifeq (,$(shell $(TARGET_CC) -o /dev/null -c -x c /dev/null -fno-stack-protector 2>/dev/null || echo 1))
   TARGET_XCFLAGS+= -fno-stack-protector
 endif