Import pthread_*.3 link pages' git history from debian/glibc.git

Import pthread_*.3 link pages' git history from debian/glibc.git

These are the link pages, which I forgot to import in 87183bb8e9ec
("Import debian/local/manpages/pthread_*.3 git history from debian/glibc")
They aren't files in the debian repository, but they were generated at
build time, which is the reason I missed them.

Here's the process:

$ git clone git@salsa.debian.org:glibc-team/glibc.git
$ cd glibc/
$ git filter-repo --path debian/debhelper.in/glibc-doc.links
$ git tag | xargs git tag -d
$ git branch | xargs git branch -D
$ git remote add man file:///home/alx/src/linux/man-pages/man-pages/.bare.git
$ git fetch man
$ git rebase man/contrib

Subsequent commits will move the pages to the appropriate place.

Fixes: 87183bb8e9ec ("Import debian/local/manpages/pthread_*.3 git history from debian/glibc")
Link: <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1068188>
Link: <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1068166>
Link: <https://lore.kernel.org/linux-man/703ec07e-dd2b-bbc6-f1bc-f495e53b764f@gmail.com/T/>
Cc: Marcos Fouces <marcos@debian.org>
Cc: Sven Joachim <svenjoac@gmx.de>
Cc: Bas Couwenberg <sebastic@xs4all.nl>
Cc: Andreas Beckmann <anbe@debian.org>
Signed-off-by: Alejandro Colomar <alx@kernel.org>