add missing sig_app_layer flags for dce sigs

src/detect-dce-iface.c

@@ -375,6 +375,8 @@ static int DetectDceIfaceSetup(DetectEngineCtx *de_ctx, Signature *s, char *arg)
     }
 
     s->alproto = ALPROTO_DCERPC;
+    /* Flagged the signature as to inspect the app layer data */
+    s->flags |= SIG_FLAG_APPLAYER;
     return 0;
 
  error:

src/detect-dce-opnum.c

@@ -330,6 +330,8 @@ static int DetectDceOpnumSetup(DetectEngineCtx *de_ctx, Signature *s, char *arg)
     }
 
     s->alproto = ALPROTO_DCERPC;
+    /* Flagged the signature as to inspect the app layer data */
+    s->flags |= SIG_FLAG_APPLAYER;
     return 0;
 
  error:

src/detect-dce-stub-data.c

@@ -138,6 +138,8 @@ static int DetectDceStubDataSetup(DetectEngineCtx *de_ctx, Signature *s, char *a
     }
 
     s->alproto = ALPROTO_DCERPC;
+    /* Flagged the signature as to inspect the app layer data */
+    s->flags |= SIG_FLAG_APPLAYER;
     return 0;
 
  error: