[ostree] tests: Add OT_TEST_DEBUG environment variable

[Colin Walters <walters src gnome org>]

commit 8bda1c6a842a96392fdac17e81cddf226fcbe7c9
Author: Colin Walters <walters verbum org>
Date:   Wed Nov 9 05:28:13 2011 -0500

    tests: Add OT_TEST_DEBUG environment variable

 tests/libtest.sh |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/tests/libtest.sh b/tests/libtest.sh
index f6c889b..8ebedf7 100644
--- a/tests/libtest.sh
+++ b/tests/libtest.sh
@@ -29,6 +29,10 @@ touch "$test_tmpdir/.test$$"
 
 export G_DEBUG=fatal-warnings
 
+if test -n "${OT_TESTS_DEBUG}"; then
+    set -x
+fi
+
 die () {
     if test -z "$OT_TESTS_SAVE_TEMPS"; then
         test -f "$test_tmpdir/.test$$" && rm -rf "$test_tmpdir"