Use libm_alias_double for sparc.

Continuing the preparation for additional _FloatN / _FloatNx function
aliases, this patch makes sparc libm function implementations use
libm_alias_double to define function aliases (with consequent
simplification where compat symbol handling is now done by those
macros rather than locally in architecture-specific code).

Tested with build-many-glibcs.py for all its sparc configurations that
installed stripped shared libraries are unchanged by the patch.

	* sysdeps/sparc/sparc32/fpu/s_copysign.S: Include
	<libm-alias-double.h>.
	(copysign): Define using libm_alias_double.
	* sysdeps/sparc/sparc32/fpu/s_fabs.S: Include
	<libm-alias-double.h>.
	(fabs): Define using libm_alias_double.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_copysign.S:
	Include <libm-alias-double.h>.
	(copysign): Define using libm_alias_double.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fabs.S: Include
	<libm-alias-double.h>.
	(fabs): Define using libm_alias_double.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdim.c: Include
	<libm-alias-double.h>.
	(fdim): Define using libm_alias_double.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fma.c: Include
	<libm-alias-double.h>.
	(fma): Define using libm_alias_double.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_llrint.S: Include
	<libm-alias-double.h>.
	(llrint): Define using libm_alias_double.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_nearbyint.S:
	Include <libm-alias-double.h>.
	(nearbyint): Define using libm_alias_double.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_rint.S: Include
	<libm-alias-double.h>.
	(rint): Define using libm_alias_double.
	* sysdeps/sparc/sparc32/sparcv9/fpu/s_fabs.S: Include
	<libm-alias-double.h>.
	(fabs): Define using libm_alias_double.
	* sysdeps/sparc/sparc32/sparcv9/fpu/s_llrint.S: Include
	<libm-alias-double.h>.
	(llrint): Define using libm_alias_double.
	* sysdeps/sparc/sparc32/sparcv9/fpu/s_nearbyint.S: Include
	<libm-alias-double.h>.
	(nearbyint): Define using libm_alias_double.
	* sysdeps/sparc/sparc32/sparcv9/fpu/s_rint.S: Include
	<libm-alias-double.h>.
	(rint): Define using libm_alias_double.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceil.c: Include
	<libm-alias-double.h>.
	(ceil): Define using libm_alias_double.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floor.c: Include
	<libm-alias-double.h>.
	(floor): Define using libm_alias_double.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_fma.c: Include
	<libm-alias-double.h>.
	(fma): Define using libm_alias_double.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_lrint.c: Include
	<libm-alias-double.h>.
	(lrint): Define using libm_alias_double.
	(llrint): Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_nearbyint.c: Include
	<libm-alias-double.h>.
	(nearbyint): Define using libm_alias_double.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_rint.c: Include
	<libm-alias-double.h>.
	(rint): Define using libm_alias_double.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_trunc.c: Include
	<libm-alias-double.h>.
	(trunc): Define using libm_alias_double.
	* sysdeps/sparc/sparc64/fpu/s_copysign.S: Include
	<libm-alias-double.h>.
	(copysign): Define using libm_alias_double.
	* sysdeps/sparc/sparc64/fpu/s_fabs.c: Include
	<libm-alias-double.h>.
	(fabs): Define using libm_alias_double.
	* sysdeps/sparc/sparc64/fpu/s_lrint.S: Include
	<libm-alias-double.h>.
	(lrint): Define using libm_alias_double.
	(llrint): Likewise.
	* sysdeps/sparc/sparc64/fpu/s_nearbyint.S: Include
	<libm-alias-double.h>.
	(nearbyint): Define using libm_alias_double.
	* sysdeps/sparc/sparc64/fpu/s_rint.S: Include
	<libm-alias-double.h>.
	(rint): Define using libm_alias_double.