SHT_NOTE sections can be mapped in memory by PT_NOTE segments. When
rewriting an SHT_NOTE, attempt to also rewrite a matching segment if it
exists.

Note that an ELF can contain multiple SHT_NOTE sections, and a given
PT_NOTE segment can theoretically map multiple contiguous sections.
There are multiple ways this could be handled, the one picked here is to
pre-normalize PT_NOTE segments so that a multi-section segment gets
broken up into multiple separate segments instead.

Also fix (or more like hack around) alignment issues with note sections.
Keeping the original alignment value when possible is important because
it determines how the data within the section needs to be parsed.

Better support relocating NOTE sections/segments + tests!