Don't move weak alias dyn_relocs to weakdef

Don't move weak alias dyn_relocs to weakdef

I did this for powerpc64 a while ago.  Not moving weak symbol
dyn_relocs to the strong alias makes for a much simpler test for
dynamic relocs in relocate_section.

This patch implements the change for powerpc and hppa.  Other targets
could benefit from similar changes.

	* elf32-hppa.c (pc_dynrelocs): Define.
	(elf32_hppa_copy_indirect_symbol): Don't copy dyn_relocs to weakdefs.
	(alias_readonly_dynrelocs): New function.
	(elf32_hppa_adjust_dynamic_symbol): Don't clear non_got_ref to
	indicate dyn_relocs should be discarded, discard them here.
	Use alias_readonly_dynrelocs.
	(allocate_dynrelocs): Don't test or clear non_got_ref.
	(elf32_hppa_relocate_section): Simplify test for dynamic relocs.
	* elf32-ppc.c (ppc_elf_copy_indirect_symbol): Don't copy dyn_relocs
	to weakdefs.
	(alias_readonly_dynrelocs, pc_dynrelocs): New functions.
	(ppc_elf_adjust_dynamic_symbol): Don't clear non_got_ref to
	indicate dyn_relocs should be discarded, discard them here.
	Use alias_readonly_dynrelocs.
	(allocate_dynrelocs): Don't test or clear non_got_ref.
	(ppc_elf_relocate_section): Simplify test for dynamic relocs.