Move seqset as it uses pointeroffset and that is aal.

Author: mjp41

src/snmalloc/ds_aal/ds_aal.h

@@ -7,4 +7,5 @@
 #include "../aal/aal.h"
 #include "flaglock.h"
 #include "prevent_fork.h"
+#include "seqset.h"
 #include "singleton.h"

src/snmalloc/ds_core/seqset.h renamed to src/snmalloc/ds_aal/seqset.h

@@ -15,6 +15,5 @@
 #include "mitigations.h"
 #include "ptrwrap.h"
 #include "redblacktree.h"
-#include "seqset.h"
 #include "stats.h"
 #include "tid.h"