Change sync.profile back to using refs/heads/master for qtbase

The issue that caused crashes with a more recent qtbase
was fixed in commit ddf9883f

.

Task-number: QTBUG-22574
Change-Id: Ia85b7265103e03f71585c5b72496af83056a4fcf
Reviewed-by: Alan Alpert <alan.alpert@nokia.com>

sync.profile

@@ -29,6 +29,6 @@
 #   - any git symbolic ref resolvable from the module's repository (e.g. "refs/heads/master" to track master branch)
 #
 %dependencies = (
-        "qtbase" => "3e0dece1518989bfd6cf5769e574ce199670ec88",
+        "qtbase" => "refs/heads/master",
         "qtxmlpatterns" => "refs/heads/master",
 );