Header refactoring: break out ph.h dependencies

include/jemalloc/internal/extent_externs.h

@@ -1,6 +1,8 @@
 #ifndef JEMALLOC_INTERNAL_EXTENT_EXTERNS_H
 #define JEMALLOC_INTERNAL_EXTENT_EXTERNS_H
 
+#include "jemalloc/internal/ph.h"
+
 extern rtree_t			extents_rtree;
 extern const extent_hooks_t	extent_hooks_default;
 

include/jemalloc/internal/extent_structs.h

@@ -1,6 +1,8 @@
 #ifndef JEMALLOC_INTERNAL_EXTENT_STRUCTS_H
 #define JEMALLOC_INTERNAL_EXTENT_STRUCTS_H
 
+#include "jemalloc/internal/ph.h"
+
 typedef enum {
 	extent_state_active   = 0,
 	extent_state_dirty    = 1,

include/jemalloc/internal/jemalloc_internal.h.in

@@ -180,7 +180,6 @@ static const bool have_percpu_arena =
 #include <mach/vm_map.h>
 #endif
 
-#include "jemalloc/internal/ph.h"
 #ifndef __PGI
 #define RB_COMPACT
 #endif