x86: Dump local IFUNC functions in the map file

x86: Dump local IFUNC functions in the map file

Dump local IFUNC functions in the map file when generating IRELATIVE
relocations if -Map is used.

bfd/

	* elf32-i386.c (elf_i386_check_relocs): Set local IFUNC symbol
	name.  Use local IFUNC symbol name string to report unsupported
	non-PIC call to IFUNC function.
	(elf_i386_relocate_section): Dump local IFUNC name with minfo
	when generating R_386_IRELATIVE relocation.
	(elf_i386_finish_dynamic_symbol): Likewise.
	* elf_x86_64_check_relocs (elf_x86_64_check_relocs): Set local
	IFUNC symbol name.
	(elf_x86_64_relocate_section): Dump local IFUNC name with minfo
	when generating R_X86_64_IRELATIVE relocation.
	(elf_x86_64_finish_dynamic_symbol): Likewise.

ld/

	* testsuite/ld-ifunc/ifunc-1-local-x86.d: Pass
	"-Map tmpdir/ifunc-1-local-x86.map" to ld and check
	ifunc-1-local-x86.map.
	* testsuite/ld-ifunc/ifunc-1-x86.d: Pass
	"-Map tmpdir/ifunc-1-x86.map" to ld and check ifunc-1-x86.map.
	* testsuite/ld-ifunc/ifunc-1-local-x86.map: New file.
	* testsuite/ld-ifunc/ifunc-1-x86.map: Likewise.