umbim: fixes build with gcc 11 (#10163)

Fixes: #10126

Author: zhangguanzhang

package/network/utils/umbim/Makefile

@@ -1,7 +1,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=umbim
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(PROJECT_GIT)/project/umbim.git
@@ -34,7 +34,7 @@ define Package/umbim/description
 endef
 
 TARGET_CFLAGS += \
-	-I$(STAGING_DIR)/usr/include -ffunction-sections -fdata-sections
+	-I$(STAGING_DIR)/usr/include -ffunction-sections -fdata-sections -Wno-address-of-packed-member
 
 TARGET_LDFLAGS += -Wl,--gc-sections