Add Asan profile, fix multiple bugs.

Added Asan profile to help catch and fix various bugs (and indeed, there
were few of them).

Additionally, fixed bhunit macro to process arguments only once.

test/src/testalgo.c

@@ -480,4 +480,4 @@ int main(int argc, char **argv)
     bh_unit_add("heap_replace", check_heap_replace);
 
     return bh_unit_run();
-}
+}