v0.3.1

[Timothy-Liuxf]

What's new

• Fix - Replace the old v7 format with pax format to break the limitation that the length of path of files should be no more than 99 characters
• Change - Update the git repository url of submodule autoreconf-archive to the GitHub mirror since the original url (git://git.sv.gnu.org/autoconf-archive.git) becomes invalid

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This discussion was created from the release v0.3.1.