Fix error when applying upperdir tar snapshot containing empty files #12230
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Fix error when applying upperdir tar snapshot containing empty files
Added size check to prevent sentry tmpfs mknodFromTar from trying to write empty files, this caused running containers from a snapshot from upper tar to fail when empty files were in the archive.
Fixes #12228
FUTURE_COPYBARA_INTEGRATE_REVIEW=#12229 from dylanlanigansmith:dylanlanigansmith-fix-mknodFromTar-writing-empty-files 63b807f