[merge conflicts] update libchdr based on latest upstream

[negativeExponent]

May (or may not) fix a few chd-related issues listed below. It doesn't hurt if doesn't fix in any case:

#157
#129
#80

Related libchdr update that fixes at least 1 issue:
libretro/pcsx_rearmed@9c659ff

Related issue with regards to dependency resync:
rtissera/libchdr#24

[inactive123]

@negativeExponent Do not close this. I very much want to merge this but we will first have to make sure that libchdr on both RetroArch and this repo are on the same page. Have some patience please.

And again, if there are issues, let's talk about it in DM. As it is, closing issues like this here is just going to be inconveniencing users in the end. I really think there has been some big misunderstanding here and I'm willing to work it out over DM.

[negativeExponent]

due to structure changes on upstream, this is probably irrelevant to merge unless updated.

[negativeExponent]

update to latest upstream changes, but retains folder structure and filename changes to still comply to current layout

NOTE: dependencies not updated.

[negativeExponent]

im discontinuing this. im gettng merge conflicts now.

[inactive123]

@negativeExponent No worries, @rtissera will make sure libchdr in this and other cores gets updated

[inactive123]

@rtissera can you fix this up?

[inactive123]

Or should it be closed?

[negativeExponent]

this is outdated. and core already have merge latest deps and libchdr.

closing this then to avoid confusion.