ELF: Group PT_NOTE segments by section alignments

ELF: Group PT_NOTE segments by section alignments

Alignments of SHT_NOTE sections can be 8 bytes for 64-bit ELF files.  We
should put all adjacent SHT_NOTE sections with the same section alignment
into a single PT_NOTE segment even when the section alignment != 4 bytes.
Also check SHT_NOTE section type instead of section name.

	PR ld/23658
	* elf.c (get_program_header_size): Put all adjacent SHT_NOTE
	sections with the same section alignment into a single PT_NOTE
	segment.  Check SHT_NOTE section type instead of section name.
	(_bfd_elf_map_sections_to_segments): Likewise.