Do not generate unused tsd_*_[gs]et() functions.

This avoids a gcc diagnostic note:
    note: The ABI for passing parameters with 64-byte alignment has
    changed in GCC 4.6
This note related to the cacheline alignment of rtree_ctx_t, which was
introduced by 4a346f5593 (Replace rtree
path cache with LRU cache.).

src/tsd.c

@@ -72,7 +72,7 @@ tsd_cleanup(void *arg) {
 #define MALLOC_TSD_cleanup_yes(n, t)					\
 		n##_cleanup(tsd);
 #define MALLOC_TSD_cleanup_no(n, t)
-#define O(n, t, c)							\
+#define O(n, t, gs, c)							\
 		MALLOC_TSD_cleanup_##c(n, t)
 MALLOC_TSD
 #undef MALLOC_TSD_cleanup_yes