fix android build

after
    commit 589ce330
    Date:   Mon Feb 25 14:38:21 2019 +0200
    sal_uIntPtr->sal_uInt64 in SalTimer::Start

Change-Id: I0091ac4750dfb2ca8a3f4b5a544f7ec4f0ee0957

vcl/inc/headless/svpinst.hxx

@@ -52,7 +52,7 @@ public:
     virtual ~SvpSalTimer() override;
 
     // override all pure virtual methods
-    virtual void Start( sal_uLong nMS ) override;
+    virtual void Start( sal_uInt64 nMS ) override;
     virtual void Stop() override;
 };