Fix 1477: Add (ly:expect-warning msg args) to suppress expected warnings (issue 5037046)

[pkx166h]

Passes make and reg tests look ok but I guess someone who really knows
should check

See:

http://lilypond-stuff.1065243.n5.nabble.com/http-code-google-com-p-lilypond-issues-detail-id-1477-td4835846.html

This has a zipped dir of the make check results.

http://codereview.appspot.com/5037046/