Check reloc against IFUNC symbol only with dynamic symbols

Check reloc against IFUNC symbol only with dynamic symbols

There is no need to check relocation IFUNC symbol if there are no
dynamic symbols.

bfd/

	PR ld/19539
	* elf32-i386.c (elf_i386_reloc_type_class): Check relocation
	against STT_GNU_IFUNC symbol only with dynamic symbols.
	* elf64-x86-64.c (elf_x86_64_reloc_type_class): Likewise.

ld/

	PR ld/19539
	* testsuite/ld-elf/pr19539.d: New file.
	* testsuite/ld-elf/pr19539.s: Likewise.
	* testsuite/ld-elf/pr19539.t: Likewise.