Update list of ELF machine numbers.

Update list of ELF machine numbers.

include	* elf/common.h (DT_SYMTAB_SHNDX): Define.
	(EM_CLOUDSHIELD, EM_COREA_1ST, EM_COREA_2ND, EM_OPEN8): Define.
	(EM_VIDEOCORE5, EM_56800EX, EM_BA1, EM_BA2, EM_XCORE): Define.
	(EM_MCHP_PIC, EM_KM32, EM_KMX32, EM_KMX16, EM_KMX8): Define.
	(EM_KVARC, EM_CDP, EM_COGE, EM_COOL, EM_NORC): Define.
	(EM_CSR_KALIMBA, EM_Z80, EM_AMDGPU, EM_RISCV): Define.
	(ELFOSABI_OPENVOS): Define.
	(GRP_MASKOS, GRP_MASKPROC): Define.

binutils	* readelf.c (get_dynamic_type): Add DT_SYMTAB_SHNDX.
	(get_machine_type): Add EM_CLOUDSHIELD, EM_COREA_1ST,
	EM_COREA_2ND, EM_OPEN8, EM_VIDEOCORE5, EM_56800EX, EM_BA1, EM_BA2,
	EM_XCORE, EM_MCHP_PIC, EM_KM32, EM_KMX32, EM_KMX16, EM_KMX8,
	EM_KVARC, EM_CDP, EM_COGE, EM_COOL, EM_NORC, EM_CSR_KALIMBA,
	EM_Z80, EM_AMDGPU, EM_RISCV.
	(get_osabi_name): Add ELFOSABI_CLOUDABI and ELFOSABI_OPENVS.
	(get_group_flags): Update to handle flags in the
	GRP_MASKOS and GRP_MASKPROC ranges.