revisions API: have release_revisions() release "grep_filter"

Extend the the release_revisions() function so that it frees the
"grep_filter" in the "struct rev_info".This allows us to mark a test
as passing under "TEST_PASSES_SANITIZE_LEAK=true".

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

revision.c

@@ -2950,6 +2950,7 @@ void release_revisions(struct rev_info *revs)
 	release_revisions_cmdline(&revs->cmdline);
 	list_objects_filter_release(&revs->filter);
 	release_revisions_mailmap(revs->mailmap);
+	free_grep_patterns(&revs->grep_filter);
 }
 
 static void add_child(struct rev_info *revs, struct commit *parent, struct commit *child)

t/t9151-svn-mergeinfo.sh

@@ -5,7 +5,6 @@
 
 test_description='git-svn svn mergeinfo properties'
 
-TEST_FAILS_SANITIZE_LEAK=true
 . ./lib-git-svn.sh
 
 test_expect_success 'load svn dump' "