Add some polyphonically directed grobs (issue4387046)

[bordage . bertrand]

Reviewers: ,

Message:
Small patch that takes new grobs in account :
Accidental suggestions, dynamics, ligatures and spanned trills.

Regards,
Bertrand

Description:
Add some polyphonically directed grobs

Accidental suggestions, dynamics, ligatures and spanned trills added to
direction-polyphonic-grobs.

Please review this at http://codereview.appspot.com/4387046/

Affected files:
  M scm/music-functions.scm


Index: scm/music-functions.scm
diff --git a/scm/music-functions.scm b/scm/music-functions.scm
index  
9790cbf1a3d145a8524b3e20b1b874c59c117de6..6192cbd4863e69c21ced4fc1bf99ae2ac6fa4daf  
100644
--- a/scm/music-functions.scm
+++ b/scm/music-functions.scm
@@ -400,10 +400,14 @@ in @var{grob}."
              'grob-property gprop))

 (define direction-polyphonic-grobs
-  '(DotColumn
+  '(AccidentalSuggestion
+    DotColumn
     Dots
+    DynamicLineSpanner
+    DynamicText
     Fingering
     LaissezVibrerTie
+    LigatureBracket
     PhrasingSlur
     RepeatTie
     Rest
@@ -411,7 +415,8 @@ in @var{grob}."
     Slur
     Stem
     TextScript
-    Tie))
+    Tie
+    TrillSpanner))

 (define-safe-public (make-voice-props-set n)
   (make-sequential-music