* libelf.h (elf_obj_tdata): Add members for dynamic symbol table

	* libelf.h (elf_obj_tdata):  Add members for dynamic symbol table
	handling.
	* elfcode.h (bfd_section_from_shdr):  Handle dynamic symbol table.
	* elfcode.h (elf_slurp_symbol_table):  Take additional parameter
	to select static or dynamic symbol table and return number of
	symbols slurped or -1 on error.
	* elfcode.h (elf_get_symtab):  Set bfd symcount from
	elf_slurp_symbol_table result.
	* elfcode.h (elf_get_dynamic_symtab_upper_bound,
	elf_canonicalize_dynamic_symtab):  New functions to handle dynamic
	symbol table.
	* elf32-target.h, elf64-target.h (BFD_JUMP_TABLE_DYNAMIC):
	Change to handle dynamic symbol table, provide default definitions
	for dynamic relocs.
	* aoutx.h (howto_table_std, NAME(aout,swap_std_reloc_out),
	NAME(aout,swap_std_reloc_in), aout_link_input_section_std,
	aout_link_reloc_link_order):  Handle r_jmptable and r_relative
	relocations.