Break two include cycles

- test_hooks.h: drop the #include of jemalloc_preamble.h.  preamble
  pulls test_hooks.h, and test_hooks.h needs nothing from preamble.

- edata.h: drop the #include of prof_types.h in favor of forward
  declarations of prof_tctx_t and prof_recent_t (used only as pointer
  types).  prof_structs.h can then drop its #include of edata.h,
  severing the edata <-> prof_types coupling.

include/jemalloc/internal/edata.h

@@ -8,13 +8,16 @@
 #include "jemalloc/internal/hpdata.h"
 #include "jemalloc/internal/nstime.h"
 #include "jemalloc/internal/ph.h"
-#include "jemalloc/internal/prof_types.h"
 #include "jemalloc/internal/ql.h"
 #include "jemalloc/internal/sc.h"
 #include "jemalloc/internal/slab_data.h"
 #include "jemalloc/internal/sz.h"
 #include "jemalloc/internal/typed_list.h"
 
+/* Opaque to edata; only stored as pointers in e_prof_info_t. */
+typedef struct prof_tctx_s   prof_tctx_t;
+typedef struct prof_recent_s prof_recent_t;
+
 /*
  * sizeof(edata_t) is 128 bytes on 64-bit architectures.  Ensure the alignment
  * to free up the low bits in the rtree leaf.

include/jemalloc/internal/prof_structs.h

@@ -3,7 +3,6 @@
 
 #include "jemalloc/internal/jemalloc_preamble.h"
 #include "jemalloc/internal/ckh.h"
-#include "jemalloc/internal/edata.h"
 #include "jemalloc/internal/mutex.h"
 #include "jemalloc/internal/prng.h"
 #include "jemalloc/internal/rb.h"

include/jemalloc/internal/test_hooks.h

@@ -1,8 +1,6 @@
 #ifndef JEMALLOC_INTERNAL_TEST_HOOKS_H
 #define JEMALLOC_INTERNAL_TEST_HOOKS_H
 
-#include "jemalloc/internal/jemalloc_preamble.h"
-
 extern JEMALLOC_EXPORT void (*test_hooks_arena_new_hook)(void);
 extern JEMALLOC_EXPORT void (*test_hooks_libc_hook)(void);
 extern JEMALLOC_EXPORT void (*test_hooks_safety_check_abort)(const char *);