Remove SPARC lllrint aliases.

The sparc32/sparcv9/fpu/multiarch implementations of llrint / llrintf
have aliases lllrint / lllrintf.  No such function is exported from or
used in libm and these aliases should not be there; I expect they
arose accidentally in the course of converting a 64-bit implementation
(where lrint and llrint can be aliases) to a 32-bit llrint
implementation.  This patch removes those spurious aliases.

Tested (compilation only) with build-many-glibcs.py for
sparcv9-linux-gnu.

	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_llrint.S
	(__lllrint): Remove alias.
	(lllrint): Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_llrintf.S
	(__lllrintf): Likewise.
	(lllrintf): Likewise.