Merge #21130: script: Make LXC container size suitable for gitian builds

166266a script: Make LXC container size suitable for gitian builds (Hennadii Stepanov)

Pull request description:

  This change prevents "No space left on device" error.

  See:
  - bitcoin/bitcoin#21036 (comment)
  - bitcoin/bitcoin#21036 (comment)

ACKs for top commit:
  jonasschnelli:
    ACK 166266a - I had to add this manually to my nighly build base image

Tree-SHA512: 47d84c3a65f0a17013b2cb970c34bfa4e600e83066be302ff10280aefefa0a7c6cb6c21a191b3e8e6fcd1c292d1c434cc4769e04626c4536050aced29b34d573

Author: laanwj

contrib/gitian-build.py

@@ -39,7 +39,7 @@ def setup():
     if args.docker:
         make_image_prog += ['--docker']
     elif not args.kvm:
-        make_image_prog += ['--lxc']
+        make_image_prog += ['--lxc', '--disksize', '13000']
     subprocess.check_call(make_image_prog)
     os.chdir(workdir)
     if args.is_focal and not args.kvm and not args.docker: