Run license activation in an empty directory (#285)

dist/steps/activate.sh

@@ -1,5 +1,9 @@
 #!/usr/bin/env bash
 
+# Run in ACTIVATE_LICENSE_PATH directory
+echo "Changing to \"$ACTIVATE_LICENSE_PATH\" directory."
+pushd "$ACTIVATE_LICENSE_PATH"
+
 if [[ -n "$UNITY_LICENSE" ]] || [[ -n "$UNITY_LICENSE_FILE" ]]; then
   #
   # PERSONAL LICENSE MODE
@@ -98,3 +102,6 @@ else
   echo "Exit code was: $UNITY_EXIT_CODE"
   exit $UNITY_EXIT_CODE
 fi
+
+# Return to previous working directory
+popd