SetSearchPathMode prototype

git-svn-id: https://mingw-w64.svn.sourceforge.net/svnroot/mingw-w64@5881 4407c894-4637-0410-b4f5-ada5f102cad1
Add IInspectable and IActivationFactory IDLs

git-svn-id: https://mingw-w64.svn.sourceforge.net/svnroot/mingw-w64@5882 4407c894-4637-0410-b4f5-ada5f102cad1