sync.profile: introduce dependency on qtjsbackend

sync.profile needs to enumerate indirect dependencies too.
qtdeclarative now depends on qtjsbackend; update sync.profile
accordingly.

Change-Id: Ia6ccda2cfb971b2cd58bd9e2d880c76a5603ad37
Sanity-Review: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Simon Hausmann <simon.hausmann@nokia.com>

sync.profile

@@ -46,6 +46,7 @@
     "qtsvg" => "refs/heads/master",
     "qtxmlpatterns" => "refs/heads/master",
     "qtdeclarative" => "refs/heads/master",
+    "qtjsbackend" => "refs/heads/master",
     "qtphonon" => "refs/heads/master",
     "qtactiveqt" => "refs/heads/master",
 );