[sdk] make sure .config gets copied as file
[sdk] make sure .config gets copied as file
When using scripts/env, .config is most likely a symbolic link
pointing to env/.config. Previously the symbolic link got
copied as-is into the SDK tarball, leading to a dangling .config
symlink on the target system which prevented the SDK from working.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@29927 3c298f89-4303-0410-b956-a3cf2f4a3e73

--- a/target/sdk/Makefile
+++ b/target/sdk/Makefile
@@ -40,7 +40,7 @@
 	rm -rf \
 		$(SDK_BUILD_DIR)/target/linux/*/files \
-	$(CP) \
+	$(CP) -L \
 		$(TOPDIR)/rules.mk \
 		$(TOPDIR)/.config \