add: upload solution files for v207

ide/v207/.gitignore

@@ -0,0 +1,5 @@
+# Ignore all build files except solution and project file
+*
+!.gitignore
+!libmimalloc.sln
+!mimalloc-static.vcxproj

ide/v207/libmimalloc.sln

@@ -0,0 +1,34 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.1.32407.343
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "mimalloc-static", "mimalloc-static.vcxproj", "{3D7D41DD-5D9F-3AA3-AF08-E92D18B40A2E}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Release|x64 = Release|x64
+		Rel-LockPages|x64 = Rel-LockPages|x64
+		Rel-NoCollect|x64 = Rel-NoCollect|x64
+		Rel-ReserveOsMemory|x64 = Rel-ReserveOsMemory|x64
+		Rel-ScheduledCollect|x64 = Rel-ScheduledCollect|x64
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{3D7D41DD-5D9F-3AA3-AF08-E92D18B40A2E}.Release|x64.ActiveCfg = Release|x64
+		{3D7D41DD-5D9F-3AA3-AF08-E92D18B40A2E}.Release|x64.Build.0 = Release|x64
+		{3D7D41DD-5D9F-3AA3-AF08-E92D18B40A2E}.Rel-LockPages|x64.ActiveCfg = Rel-LockPages|x64
+		{3D7D41DD-5D9F-3AA3-AF08-E92D18B40A2E}.Rel-LockPages|x64.Build.0 = Rel-LockPages|x64
+		{3D7D41DD-5D9F-3AA3-AF08-E92D18B40A2E}.Rel-NoCollect|x64.ActiveCfg = Rel-NoCollect|x64
+		{3D7D41DD-5D9F-3AA3-AF08-E92D18B40A2E}.Rel-NoCollect|x64.Build.0 = Rel-NoCollect|x64
+		{3D7D41DD-5D9F-3AA3-AF08-E92D18B40A2E}.Rel-ReserveOsMemory|x64.ActiveCfg = Rel-ReserveOsMemory|x64
+		{3D7D41DD-5D9F-3AA3-AF08-E92D18B40A2E}.Rel-ReserveOsMemory|x64.Build.0 = Rel-ReserveOsMemory|x64
+		{3D7D41DD-5D9F-3AA3-AF08-E92D18B40A2E}.Rel-ScheduledCollect|x64.ActiveCfg = Rel-ScheduledCollect|x64
+		{3D7D41DD-5D9F-3AA3-AF08-E92D18B40A2E}.Rel-ScheduledCollect|x64.Build.0 = Rel-ScheduledCollect|x64
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {F91F09F2-3AB3-3424-9D9A-37CACB9AAA78}
+	EndGlobalSection
+EndGlobal