Support x64 configuration for old VS2015 projects
diff --git a/googlemock/msvc/2015/gmock.sln b/googlemock/msvc/2015/gmock.sln
index c59e07f..d4203a8 100644
--- a/googlemock/msvc/2015/gmock.sln
+++ b/googlemock/msvc/2015/gmock.sln
@@ -10,21 +10,35 @@
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Win32 = Debug|Win32
+		Debug|x64 = Debug|x64
 		Release|Win32 = Release|Win32
+		Release|x64 = Release|x64
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
 		{34681F0D-CE45-415D-B5F2-5C662DFE3BD5}.Debug|Win32.ActiveCfg = Debug|Win32
 		{34681F0D-CE45-415D-B5F2-5C662DFE3BD5}.Debug|Win32.Build.0 = Debug|Win32
+		{34681F0D-CE45-415D-B5F2-5C662DFE3BD5}.Debug|x64.ActiveCfg = Debug|x64
+		{34681F0D-CE45-415D-B5F2-5C662DFE3BD5}.Debug|x64.Build.0 = Debug|x64
 		{34681F0D-CE45-415D-B5F2-5C662DFE3BD5}.Release|Win32.ActiveCfg = Release|Win32
 		{34681F0D-CE45-415D-B5F2-5C662DFE3BD5}.Release|Win32.Build.0 = Release|Win32
+		{34681F0D-CE45-415D-B5F2-5C662DFE3BD5}.Release|x64.ActiveCfg = Release|x64
+		{34681F0D-CE45-415D-B5F2-5C662DFE3BD5}.Release|x64.Build.0 = Release|x64
 		{F10D22F8-AC7B-4213-8720-608E7D878CD2}.Debug|Win32.ActiveCfg = Debug|Win32
 		{F10D22F8-AC7B-4213-8720-608E7D878CD2}.Debug|Win32.Build.0 = Debug|Win32
+		{F10D22F8-AC7B-4213-8720-608E7D878CD2}.Debug|x64.ActiveCfg = Debug|x64
+		{F10D22F8-AC7B-4213-8720-608E7D878CD2}.Debug|x64.Build.0 = Debug|x64
 		{F10D22F8-AC7B-4213-8720-608E7D878CD2}.Release|Win32.ActiveCfg = Release|Win32
 		{F10D22F8-AC7B-4213-8720-608E7D878CD2}.Release|Win32.Build.0 = Release|Win32
+		{F10D22F8-AC7B-4213-8720-608E7D878CD2}.Release|x64.ActiveCfg = Release|x64
+		{F10D22F8-AC7B-4213-8720-608E7D878CD2}.Release|x64.Build.0 = Release|x64
 		{E4EF614B-30DF-4954-8C53-580A0BF6B589}.Debug|Win32.ActiveCfg = Debug|Win32
 		{E4EF614B-30DF-4954-8C53-580A0BF6B589}.Debug|Win32.Build.0 = Debug|Win32
+		{E4EF614B-30DF-4954-8C53-580A0BF6B589}.Debug|x64.ActiveCfg = Debug|x64
+		{E4EF614B-30DF-4954-8C53-580A0BF6B589}.Debug|x64.Build.0 = Debug|x64
 		{E4EF614B-30DF-4954-8C53-580A0BF6B589}.Release|Win32.ActiveCfg = Release|Win32
 		{E4EF614B-30DF-4954-8C53-580A0BF6B589}.Release|Win32.Build.0 = Release|Win32
+		{E4EF614B-30DF-4954-8C53-580A0BF6B589}.Release|x64.ActiveCfg = Release|x64
+		{E4EF614B-30DF-4954-8C53-580A0BF6B589}.Release|x64.Build.0 = Release|x64
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE