Add Andes nds32 dynamic relocations to elf.h

	* elf/elf.h (R_NDS32_NONE): New define.
	(R_NDS32_32_RELA): Likewise.
	(R_NDS32_COPY): Likewise.
	(R_NDS32_GLOB_DAT): Likewise.
	(R_NDS32_JUMP_SLOT): Likewise.
	(R_NDS32_RELATIVE): Likewise.
	(R_NDS32_TLS_TPOFF): Likewise.
	(R_NDS32_TLS_DESC): Likewise.