linux: add linux/linux26-savedefconfig support

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

Makefile

@@ -652,6 +652,7 @@ ifeq ($(BR2_PACKAGE_BUSYBOX),y)
 endif
 ifeq ($(BR2_LINUX_KERNEL),y)
 	@echo '  linux-menuconfig       - Run Linux kernel menuconfig'
+	@echo '  linux-savedefconfig    - Run Linux kernel savedefconfig'
 endif
 ifeq ($(BR2_TOOLCHAIN_BUILDROOT),y)
 	@echo '  uclibc-menuconfig      - Run uClibc menuconfig'

linux/linux.mk

@@ -184,6 +184,10 @@ linux-menuconfig linux-xconfig linux-gconfig linux-nconfig linux26-menuconfig li
 		$(subst linux-,,$(subst linux26-,,$@))
 	rm -f $(LINUX_DIR)/.stamp_{built,target_installed,images_installed}
 
+linux-savedefconfig linux26-savedefconfig: dirs $(LINUX_DIR)/.stamp_configured
+	$(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) \
+		$(subst linux-,,$(subst linux26-,,$@))
+
 # Support for rebuilding the kernel after the initramfs file list has
 # been generated in $(BINARIES_DIR)/rootfs.initramfs.
 $(LINUX_DIR)/.stamp_initramfs_rebuilt: $(LINUX_DIR)/.stamp_target_installed $(LINUX_DIR)/.stamp_images_installed $(BINARIES_DIR)/rootfs.initramfs