Skip duration ignored for lyrics

[David Robarts]

LilyPond requires that a duration be entered for skips in Lyrics yet ignores the
duration and instead simply skips one note in the music.

%%Lyrics Skip Test.ly
\version "2.10.25"
\paper{ ragged-right=##t }

\score {
        <<
                \new Staff {
                        \new Voice = "music" \relative c' {
                                c4      c       c       c
                        }
                }
                \new Lyrics \lyricsto "music" {
                        One Two Three Four
                }
                \new Lyrics \lyricsto "music" {
                        \skip 4 Two Three Four
                }
                \new Lyrics \lyricsto "music" {
                        \skip 2 Three Four
                }
                \new Lyrics \lyricsto "music" {
                        \skip 4*3 Four
                }
        >>
}