branding: add LEDE branding

Signed-off-by: John Crispin <blogic@openwrt.org>

scripts/get_source_date_epoch.sh

@@ -9,12 +9,6 @@ try_version() {
 	[ -n "$SOURCE_DATE_EPOCH" ]
 }
 
-try_svn() {
-	[ -d .svn ] || return 1
-	SOURCE_DATE_EPOCH="$(./scripts/portable_date.sh "$(LC_ALL=C svn info | sed -ne 's/^Last Changed Date: //p')" +%s)"
-	[ -n "$SOURCE_DATE_EPOCH" ]
-}
-
 try_git() {
 	[ -e .git ] || return 1
 	SOURCE_DATE_EPOCH="$(git log -1 --format=format:%ct)"
@@ -27,5 +21,5 @@ try_hg() {
 	[ -n "$SOURCE_DATE_EPOCH" ]
 }
 
-try_version || try_svn || try_git || try_hg || SOURCE_DATE_EPOCH=""
+try_version || try_git || try_hg || SOURCE_DATE_EPOCH=""
 echo "$SOURCE_DATE_EPOCH"