hppa: Check UNDEFWEAK_NO_DYNAMIC_RELOC

Don't generate dynamic relocation against weak undefined symbol if it
is resolved to zero.  FIXME: UNDEFWEAK_NO_DYNAMIC_RELOC may need to be
checked in more places.

	PR ld/22269
	* elf32-hppa.c (ensure_undef_dynamic): Don't make undefined
	symbol dynamic if UNDEFWEAK_NO_DYNAMIC_RELOC is true.
	(allocate_dynrelocs): Discard dynamic relocations if
	UNDEFWEAK_NO_DYNAMIC_RELOC is true.
	(elf32_hppa_relocate_section): Don't generate dynamic
	relocation if UNDEFWEAK_NO_DYNAMIC_RELOC is true.