3rdparty/os_probe: Use Debian's #!/bin/sh.

Had a look at the actual Debian os-prober (1.79) package and found
that they use /bin/sh as their shell for all their os-prober scripts.
So for Fedora and other downstream packages, someone must be going
through all the scripts and changing them to /usr/bin/sh. Switch
to the Debian variety since they're the upstream of everybody for this.

Change-Id: I2bed8cb133640861311061261ff0cae8ae6f2648
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4599
Reviewed-by: Alexander G. M. Smith <agmsmith@ncf.ca>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

3rdparty/os_probe: Better wording, fix Beta+ version parsing.

Add lots of comments explaining things in the code. Also fix parsing
of Beta updates which have hrev version numbers with an extra bit at
the end, like hrev12345_67. Include architecture in the GRUB menu
title, so you can tell 32 bit and 64 bit installs apart. Switch
back to #!/usr/bin/sh, like all the other probes do.

Change-Id: Id47afe5029369c739d5177b1dd917c7d1d631ad6
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4498
Reviewed-by: Alexander G. M. Smith <agmsmith@ncf.ca>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

3rdparty/os_probe: August 2015 version of 83Haiku.

This one seems to be the final collated version with the previous
patches and ideas all included. It's version 42 (dated 20150811)
put together by Jeroen Oortwijn at
https://bazaar.launchpad.net/~idefix/ubuntu/trusty/os-prober/HaikuPM/files/head:/os-probes/mounted/x86

Change-Id: Ia7f276b45a5766c5f5bf1495d3726e5d475e2eee
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4497
Reviewed-by: Alexander G. M. Smith <agmsmith@ncf.ca>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

3rdparty/os_probe: First 83haiku with Package Manager support.

Change-Id: I9c660b1569b5439f2cd9088fde4e96512e7817d8
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4496
Reviewed-by: Alexander G. M. Smith <agmsmith@ncf.ca>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

3rdparty/os_probe: Original 83haiku GRUB auto detect Haiku.

Original version of 83haiku as seen in Debian Linux, for detecting
pre-package based Haiku OS and automatically setting up a GRUB
boot menu item for bootable Haiku partitions.

Change-Id: I0d1fe4c9b395e7912b2398ab6bac5c25d92aa64a
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4495
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Alexander G. M. Smith <agmsmith@ncf.ca>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>