toolchain/gcc: disable libmpx to fix build errors on x86 with gcc 6.1

Signed-off-by: Felix Fietkau <[email protected]>

toolchain/gcc/common.mk

@@ -104,6 +104,7 @@ GCC_CONFIGURE:= \
 		--disable-libgomp \
 		--disable-libmudflap \
 		--disable-multilib \
+		--disable-libmpx \
 		--disable-nls \
 		$(GRAPHITE_CONFIGURE) \
 		--with-host-libstdcxx=-lstdc++ \