Log Message:
pkgtools/pkglint: update to 5.7.7

Changes since 5.7.6:

Warn about packages that override user-settable variables. Packages that
define variables with the same value as the default value only get a
note instead of the warning since these definitions do not cause any
confusion.

Do not suppress technical error messages in autofix mode.

Do not warn about the package version being greater than the latest from
doc/CHANGES if the file defining the package version has been modified
locally and is about to be committed.