or1k: fix pc-relative relocation against dynamic on PC relative 26 bit relocation.

bfd	* elf32-or1k.c (or1k_elf_relocate_section): Use a separate entry
	in switch case R_OR1K_INSN_REL_26 where we need to check for
	!SYMBOL_CALLS_LOCAL() instead of !SYMBOL_REFERENCES_LOCAL().