[osg] Fix Applying patch failed

[longhuan2018]

When I building osg[collada]:x64-windows in Visual Studio 2017, I found that I will get the following message，and the dae plugin is not compiled.

Building package osg[collada,core]:x64-windows...
-- Using cached D:/vcpkg/downloads/openscenegraph-OpenSceneGraph-OpenSceneGraph-3.6.4.tar.gz
-- Extracting source D:/vcpkg/downloads/openscenegraph-OpenSceneGraph-OpenSceneGraph-3.6.4.tar.gz
-- Applying patch collada.patch
-- Applying patch failed. This is expected if this patch was previously applied.
-- Using source at D:/vcpkg/buildtrees/osg/src/raph-3.6.4-31d57533f2
-- Configuring x64-windows

So I modified the collada.patch file to make it work properly.