travis: Set CLONE_DIR if necessary

c17a2739 · A. Wilcox · 9bc59a02 · c17a2739
Verified Commit c17a2739 authored Apr 29, 2019 by A. Wilcox 🦊
--- a/.travis/config
+++ b/.travis/config
 #!/bin/sh

 NEWROOT=/srv/adelie
+CLONE_DIR=${CLONE_DIR:-$(pwd)}