HPLIP 2.8.6 -> 2.8.6b にアップデート。

リリースノートより抜粋
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Significant Changes

HPLIP 2.8.6 prematurely released code that was not intended for release.
Release 2.8.6b replaces 2.8.6 and removes that code. There is no change
in intended functionality as described in the release notes.
We do not recommend using release 2.8.6 and ask that release 2.8.6 not be redistributed.

This release focuses on adding support of recently released HP printers
(as listed below) as well as defect fixes and a few minor enhancements.
タグ ：
#ソフトウェア