Add another include path to the CFLAGS.

package/Makefile.in

@@ -22,7 +22,7 @@ TAR_OPTIONS=$(subst ",, $(BR2_TAR_OPTIONS)) -xf
 ifeq ($(BR2_TOOLCHAIN_BUILDROOT),y)
 TARGET_CFLAGS=$(TARGET_OPTIMIZATION) $(TARGET_DEBUGGING)
 else
-TARGET_CFLAGS=$(TARGET_OPTIMIZATION) $(TARGET_DEBUGGING) -I$(STAGING_DIR)/include -I$(TOOLCHAIN_EXTERNAL_PATH)/$(TOOLCHAIN_EXTERNAL_PREFIX)/include
+TARGET_CFLAGS=$(TARGET_OPTIMIZATION) $(TARGET_DEBUGGING) -I$(STAGING_DIR)/include -I$(STAGING_DIR)/usr/include -I$(TOOLCHAIN_EXTERNAL_PATH)/$(TOOLCHAIN_EXTERNAL_PREFIX)/include
 TARGET_LDFLAGS=-L$(STAGING_DIR)/lib -L$(STAGING_DIR)/usr/lib
 endif
 HOSTCC:=gcc