Avoid "inline" after return type in function definitions

[Florian Weimer]

* Joseph Myers:

> 2019-02-05  Joseph Myers  <joseph@codesourcery.com>
>
> 	* elf/dl-load.h (_dl_postprocess_loadcmd): Use __always_inline
> 	before return type, without separate inline.
> 	* elf/dl-tunables.c (maybe_enable_malloc_check): Likewise.
> 	* elf/dl-tunables.h (tunable_is_name): Likewise.
> 	* malloc/malloc.c (do_set_trim_threshold): Likewise.
> 	(do_set_top_pad): Likewise.
> 	(do_set_mmap_threshold): Likewise.
> 	(do_set_mmaps_max): Likewise.
> 	(do_set_mallopt_check): Likewise.
> 	(do_set_perturb_byte): Likewise.
> 	(do_set_arena_test): Likewise.
> 	(do_set_arena_max): Likewise.
> 	(do_set_tcache_max): Likewise.
> 	(do_set_tcache_count): Likewise.
> 	(do_set_tcache_unsorted_limit): Likewise.
> 	* nis/nis_subr.c (count_dots): Likewise.
> 	* nptl/allocatestack.c (advise_stack_range): Likewise.
> 	* sysdeps/ieee754/dbl-64/s_sin.c (do_cos): Likewise.
> 	(do_sin): Likewise.
> 	(reduce_sincos): Likewise.
> 	(do_sincos): Likewise.
> 	* sysdeps/unix/sysv/linux/x86/elision-conf.c
> 	(do_set_elision_enable): Likewise.
> 	(TUNABLE_CALLBACK_FNDECL): Likewise.

These changes look okay to me.  (I have not checked whether the patch
fixes all such issues, but at least what's there now is better than
before.)

Do you plan to submit patches to turn on individual -Werror= flags where
these are reasonable (such as -Werror=old-style-declaration)?

Thanks,
Florian