fix dpkg complaining about missing files list

[likhnic]

dpkg looks into /var/lib/dpkg/info and checks for the files list in a file for a package. So, when adding packages through apt-get install after container startup, dpkg complains dpkg: warning: files list file for package '<package_name>' missing; assuming package has no files currently installed . This warning can be ignored, but this tries to solve it by adding required files in the /var/lib/dpkg/info directory.

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