test: add known broken test for memory leaks in open

This duplicates the memory leaks reported in [1]

[1]: id:20220105224538.m36lnjn7rf3ieonc@athena

test/T800-asan.sh

@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+test_description='run code with ASAN enabled against the library'
+. $(dirname "$0")/test-lib.sh || exit 1
+
+if [ $NOTMUCH_HAVE_ASAN -ne 1 ]; then
+    printf "Skipping due to missing ASAN support\n"
+    test_done
+fi
+
+add_email_corpus
+
+TEST_CFLAGS="-fsanitize=address"
+
+test_begin_subtest "open and destroy"
+test_subtest_known_broken
+test_C ${MAIL_DIR} ${NOTMUCH_CONFIG} <<EOF
+#include <notmuch.h>
+#include <stdio.h>
+
+int main(int argc, char **argv) {
+  notmuch_database_t *db = NULL;
+
+  notmuch_status_t st = notmuch_database_open_with_config(argv[1],
+                                                          NOTMUCH_DATABASE_MODE_READ_ONLY,
+                                                          argv[2], NULL, &db, NULL);
+
+  printf("db != NULL: %d\n", db != NULL);
+  if (db != NULL)
+    notmuch_database_destroy(db);
+  return 0;
+}
+EOF
+cat <<EOF > EXPECTED
+== stdout ==
+db != NULL: 1
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_done