t0612: mark as leak-free

[Rubén Justo <rjusto@xxxxxxxxx>]

A quick test tell us that t0612 does not trigger any leak:

    $ make SANITIZE=leak test GIT_TEST_PASSING_SANITIZE_LEAK=check GIT_TEST_SANITIZE_LEAK_LOG=true GIT_TEST_OPTS=-i T=t0612-reftable-jgit-compatibility.sh
    [...]
    *** t0612-reftable-jgit-compatibility.sh ***
    in GIT_TEST_PASSING_SANITIZE_LEAK=check mode, setting --invert-exit-code for TEST_PASSES_SANITIZE_LEAK != true
    ok 1 - CGit repository can be read by JGit
    ok 2 - JGit repository can be read by CGit
    ok 3 - mixed writes from JGit and CGit
    ok 4 - JGit can read multi-level index
    # passed all 4 test(s)
    1..4
    # faking up non-zero exit with --invert-exit-code
    make[2]: *** [Makefile:75: t0612-reftable-jgit-compatibility.sh] Error 1

Let's mark it as leak-free to silence the machinery activated by
`GIT_TEST_PASSING_SANITIZE_LEAK=check`.

Reported-by: Jeff King <peff@xxxxxxxx>
Signed-off-by: Rubén Justo <rjusto@xxxxxxxxx>
---
 t/t0612-reftable-jgit-compatibility.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/t/t0612-reftable-jgit-compatibility.sh b/t/t0612-reftable-jgit-compatibility.sh
index d0d7e80b49..84922153ab 100755
--- a/t/t0612-reftable-jgit-compatibility.sh
+++ b/t/t0612-reftable-jgit-compatibility.sh
@@ -11,6 +11,7 @@ export GIT_TEST_DEFAULT_REF_FORMAT
 GIT_TEST_SPLIT_INDEX=0
 export GIT_TEST_SPLIT_INDEX
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 if ! test_have_prereq JGIT
-- 
2.45.1