Bug#1126666: haskell-prettyprinter-ansi-terminal: Mark libghc-doctest-dev as test dependency

[Bastian Germann]

Source: haskell-prettyprinter-ansi-terminal
Version: 1.1.3-4
Severity: normal

Please mark Build-Depends: libghc-doctest-dev <!nocheck> so that one can
build the package with nocheck profile activated without running the
doctests.