[ARC] ARC_PC32 dynamic reloc incorrectly generated.

Fixed issue related to the generation of ARC_PC32 dynamic relocs when symbol
is dynamic but still defined in a non shared object.

bfd/ChangeLog:

    Cupertino Miranda  <cmiranda@synopsys.com>

	elf32-arc.c (elf_arc_relocate_section): Small refactor and condition
	changes.