Fix non-standard use of friend in tuple replacement. https://sourceforge.net/projects/assimp/forums/forum/817654/topic/3735078

Disable PCH for unzip files now for the whole build matrix.

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@758 67173fc5-114c-0410-ac8e-9d2fd5bffc1f

code/BoostWorkaround/boost/tuple/tuple.hpp

@@ -152,6 +152,11 @@ namespace boost	{
 			  typename T4  = detail::nulltype>
 	class tuple	{
 
+		template <typename T0b,
+		      typename T1b,
+			  typename T2b,
+			  typename T3b,
+			  typename T4b >
 		friend class tuple;
 
 	private: