Fix test config of lg_san_uaf_align.

The option may be configure-disabled, which resulted in the invalid options
output from the tests.

test/unit/tcache_max.c

@@ -1,4 +1,7 @@
 #include "test/jemalloc_test.h"
+#include "test/san.h"
+
+const char *malloc_conf = TEST_SAN_UAF_ALIGN_DISABLE;
 
 enum {
 	alloc_option_start = 0,