Use libm_alias_double for aarch64.

Use libm_alias_double for aarch64.

Continuing the preparation for additional _FloatN / _FloatNx function
aliases, this patch makes aarch64 libm function implementations use
libm_alias_double to define function aliases.

Tested with build-many-glibcs.py for aarch64-linux-gnu that installed
stripped shared libraries are unchanged by the patch.

	* sysdeps/aarch64/fpu/s_ceil.c: Include <libm-alias-double.h>.
	(ceil): Define using libm_alias_double.
	* sysdeps/aarch64/fpu/s_floor.c: Include <libm-alias-double.h>.
	(floor): Define using libm_alias_double.
	* sysdeps/aarch64/fpu/s_fma.c: Include <libm-alias-double.h>.
	(fma): Define using libm_alias_double.
	* sysdeps/aarch64/fpu/s_fmax.c: Include <libm-alias-double.h>.
	(fmax): Define using libm_alias_double.
	* sysdeps/aarch64/fpu/s_fmin.c: Include <libm-alias-double.h>.
	(fmin): Define using libm_alias_double.
	* sysdeps/aarch64/fpu/s_llrint.c: Include <libm-alias-double.h>.
	(llrint): Define using libm_alias_double.
	* sysdeps/aarch64/fpu/s_llround.c: Include <libm-alias-double.h>.
	(llround): Define using libm_alias_double.
	* sysdeps/aarch64/fpu/s_lrint.c: Include <libm-alias-double.h>.
	(lrint): Define using libm_alias_double.
	* sysdeps/aarch64/fpu/s_lround.c: Include <libm-alias-double.h>.
	(lround): Define using libm_alias_double.
	* sysdeps/aarch64/fpu/s_nearbyint.c: Include <libm-alias-double.h>.
	(nearbyint): Define using libm_alias_double.
	* sysdeps/aarch64/fpu/s_rint.c: Include <libm-alias-double.h>.
	(rint): Define using libm_alias_double.
	* sysdeps/aarch64/fpu/s_round.c: Include <libm-alias-double.h>.
	(round): Define using libm_alias_double.
	* sysdeps/aarch64/fpu/s_trunc.c: Include <libm-alias-double.h>.
	(trunc): Define using libm_alias_double.