release: properly change working dir if tmp location already exists

Currently, the script won't change directories into the previously
cloned repository if the temporary location exists. This may be an issue
when testing first with a dry run and later with the actual release.

Signed-off-by: Ivan Valdes <ivan@vald.es>

scripts/release.sh

@@ -95,6 +95,8 @@ main() {
     run git pull origin
 
     git_assert_branch_in_sync || exit 2
+  elif [ "${IN_PLACE}" == 0 ]; then
+    cd "${reldir}/etcd" || exit 2
   fi
 
   # mark local directory as root for test_lib scripts executions