Move sysdeps/sparc/{,sparc32,sparc64}/elf files

Move sysdeps/sparc/{,sparc32,sparc64}/elf files

	* sysdeps/sparc/elf/configure.in: Moved to ...
	* sysdeps/sparc/configure.in: ... here.
	* sysdeps/sparc/elf/configure: Delete file.
	* sysdeps/sparc/sparc32/elf/start.S: Moved to ...
	* sysdeps/sparc/sparc32/start.S: ... here.
	* sysdeps/sparc/sparc64/elf/start.S: Moved to ...
	* sysdeps/sparc/sparc64/start.S: ... here.
	* sysdeps/sparc/sparc32/elf/Makefile: Merged into ...
	* sysdeps/sparc/sparc32/Makefile: ... this.
	* sysdeps/sparc/sparc64/elf/Makefile: Merged into ...
	* sysdeps/sparc/sparc64/Makefile: ... this.