binutils: fix build with gcc 4.9

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 42707

package/devel/binutils/Makefile

@@ -45,7 +45,7 @@ define Package/binutils/description
   The Binutils package contains a linker, an assembler, and other tools for handling object files
 endef
 
-TARGET_CFLAGS += $(FPIC)
+TARGET_CFLAGS += $(FPIC) -Wno-unused-value
 
 CONFIGURE_ARGS += \
 	--enable-shared \