Ensure /boot exists, Write linux version to file,in case the kernel version has changed after the first build

target/linux/Makefile.in.advanced

@@ -227,6 +227,7 @@ $(LINUX26_DIR)/.unpacked: $(DL_DIR)/$(LINUX26_SOURCE)
 ifneq ($(DOWNLOAD_LINUX26_VERSION),$(LINUX26_VERSION))
 	# Rename the dir from the downloaded version to the AFTER patch version
 	mv -f $(PROJECT_BUILD_DIR)/linux-$(DOWNLOAD_LINUX26_VERSION) $(LINUX26_DIR)
+	echo $(LINUX26_VERSION_PROBED) > $(PROJECT_BUILD_DIR)/.linux-version
 endif
 	touch $@
 
@@ -400,6 +401,7 @@ endif
 
 # -----------------------------------------------------------------------------
 $(LINUX26_DIR)/.depend_done: $(LINUX26_DIR)/.configured $(LINUX26_MKIMAGE_DEP)
+	mkdir -p $(TARGET_DIR)/boot
 	-mv $(LINUX26_DIR)/localversion* $(TARGET_DIR)/boot
 	$(MAKE) $(LINUX26_MAKE_FLAGS) -C $(LINUX26_DIR) prepare
 	touch $@