Fix qbs build.

Change-Id: I491e62bfc853f7a422f432607ef4c2f44764acb5
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>

src/plugins/texteditor/texteditor.qbs

@@ -35,6 +35,7 @@ QtcPlugin {
         "basetexteditor_p.h",
         "basetextmark.cpp",
         "basetextmark.h",
+        "basetextmarkregistry.h",
         "behaviorsettings.cpp",
         "behaviorsettings.h",
         "behaviorsettingspage.cpp",