Get bindgen libclang version correctly

[jordanisaacs]

Currently the way to retreive the bindgen libclang version is susceptible to versions within the path. This commit fixes that by using tail rather than head on the version results. Fixes #942 .

[ojeda]

Thanks Jordan! I have been improving the script, and for this, we need to match clang version before the version so that we are sure to take only the immediately one after that and not anything else anywhere it may be (like we already do for another match in the file). In addition, using tail would not work for the ...clang version 13.0.0 (Fedora 13.0.0-3.fc35)... case for which the head was added by #789.

I submitted the other approach at: https://lore.kernel.org/rust-for-linux/[email protected]/ with your Reported-by. It would be nice if you could give that patch a test on your side too (you can submit then a Tested-by tag).

In any case, please note that patches to the kernel need to be signed according to the DCO (see https://www.kernel.org/doc/html/latest/process/submitting-patches.html), i.e. they require a Signed-off-by with the real name and so on.

[ojeda]

@jordanisaacs In the patch above I used your GitHub handle and the name as in your profile for the Reported-by tag, but it would be nice to have at least your email, and ideally your real name too. Do you want me to use the one from the author field of the commit here? Or something else? I will Cc you on the patch there if you provide it to me.

[jordanisaacs]

@ojeda Couldn't apply the single patch so applied the entire patchset and for this specific issue can confirm it is fixed! Yep the author/name fields in the commit work. So "Jordan Isaacs" and mail [at] jdisaacs.com. If you could CC me that would be great and I will send a tested-by.

[ojeda]

Thanks Jordan! Cc'ing you there.