GC_malloc[_atomic] global and thread-local generalization with kind

GC_malloc[_atomic] global and thread-local generalization with kind

* include/gc_inline.h (GC_malloc_kind, GC_malloc_kind_global): New
public function declaration.
* include/gc_inline.h (GC_MALLOC_WORDS_KIND): New public macro.
* include/gc_inline.h (GC_MALLOC_WORDS, GC_MALLOC_ATOMIC_WORDS): Use
GC_MALLOC_WORDS_KIND.
* include/gc_inline.h (GC_CONS): Use GC_malloc_kind (instead of
GC_malloc); reformat code.
* include/private/gc_priv.h (MAXOBJKINDS): Allow user-defined values.
* include/private/gc_priv.h (GC_core_malloc, GC_core_malloc_atomic):
Remove prototype.
* malloc.c: Include gc_inline.h (to get GC_malloc_kind prototype).
* mallocx.c: Likewise.
* malloc.c (GC_generic_malloc_inner,
GC_generic_malloc_inner_ignore_off_page, GC_generic_malloc): Add
assertion on "k" (kind) argument (should be less than MAXOBJKINDS).
* mallocx.c (GC_generic_malloc_ignore_off_page,
GC_generic_malloc_many): Likewise.
* malloc.c (GC_generic_malloc_uncollectable): Add assertion on "k"
argument (should be less than PREDEFINED_KINDS).
* malloc.c (GC_core_malloc_atomic, GC_core_malloc): Replace with
GC_malloc_kind_global.
* malloc.c (GC_malloc_atomic, GC_malloc): Define as a wrapper around
GC_malloc_kind_global.
* malloc.c (GC_malloc_kind): Redirect to GC_malloc_kind_global if
not defined in gc_inline.h (as a macro) or in thread_local_alloc.c.
* mallocx.c (GC_generic_or_special_malloc): Call GC_malloc_kind
instead of GC_malloc_kind and GC_malloc.
* thread_local_alloc.c (GC_malloc, GC_malloc_atomic): Replace with
GC_malloc_kind; remove tiny_fl local variable; call
GC_malloc_kind_global instead of GC_core_malloc and
GC_core_malloc_atomic.
* thread_local_alloc.c (GC_destroy_thread_local): Adjust static assert
to guard against global _freelists overrun.