Move ref assembly out of Facades folder into FrameworkIntegrations

Rx.NET/Source/System.Reactive.sln

@@ -647,7 +647,7 @@ Global
 		{D548C2CA-5C32-4FFF-B9E9-A251971ED7B4} = {1873A545-87AA-4C22-BA1A-8A6602F65749}
 		{C3FC6098-AC7F-4825-B292-4049BC6FC76E} = {1873A545-87AA-4C22-BA1A-8A6602F65749}
 		{EB27A089-56EC-4621-BF88-E3B0DA8E6557} = {1873A545-87AA-4C22-BA1A-8A6602F65749}
-		{20DF1979-FD74-DD5D-60B3-CE5874101E31} = {A0F39260-B8F8-4FCB-9679-0ED917A22BDF}
+		{20DF1979-FD74-DD5D-60B3-CE5874101E31} = {1873A545-87AA-4C22-BA1A-8A6602F65749}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {2483F58F-A8D6-4FFE-A3C1-10F3A36DBE69}