leak tests: mark t3321-notes-stripspace.sh as leak-free

This test was leak-free when t3321 was originally introduced, but never marked as such: $ rev="$(git log --format='%H' --reverse -1 HEAD^ -- t/t3321-notes-stripspace.sh)" $ git checkout $rev $ make SANITIZE=leak [...] $ make -C t GIT_TEST_PASSING_SANITIZE_LEAK=check GIT_TEST_OPTS=--immediate t3321-notes-stripspace.sh [...] # passed all 27 test(s) 1..27 # faking up non-zero exit with --invert-exit-code make: *** [Makefile:66: t3321-notes-stripspace.sh] Error 1 make: Leaving directory '/home/ttaylorr/src/git/t' Mark this test as leak-free accordingly. Signed-off-by: Taylor Blau <me@ttaylorr.com> Acked-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>