lintian: Add in an explicit source format

Change-Id: Iaba8d2ab7c5a1e2b7507e42bf004e5e7e9c11d3b
(cherry picked from commit 862042d7999c77970056231ddca1a0d585bfd400)
1 file changed
tree: 6f813bf44c4fdcf8f8c865e158f84d1a0964714a
  1. debian/