Add missing MSBuildTask project

Author: josesimoes

nanoFramework.Tools.MetadataProcessor.sln

@@ -20,6 +20,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MetadataProcessor.Tests", "
 EndProject
 Project("{11A8DD76-328B-46DF-9F39-F559912D0360}") = "TestNFApp", "MetadataProcessor.Tests\TestNFApp\TestNFApp.nfproj", "{9E5E0766-701D-4266-9EBA-7B3E4338ED21}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MetadataProcessor.MsBuildTask", "MetadataProcessor.MsBuildTask\MetadataProcessor.MsBuildTask.csproj", "{9B18784E-1BF2-47D1-BDD1-85B678F883F9}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -44,6 +46,10 @@ Global
 		{9E5E0766-701D-4266-9EBA-7B3E4338ED21}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{9E5E0766-701D-4266-9EBA-7B3E4338ED21}.Release|Any CPU.Build.0 = Release|Any CPU
 		{9E5E0766-701D-4266-9EBA-7B3E4338ED21}.Release|Any CPU.Deploy.0 = Release|Any CPU
+		{9B18784E-1BF2-47D1-BDD1-85B678F883F9}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{9B18784E-1BF2-47D1-BDD1-85B678F883F9}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{9B18784E-1BF2-47D1-BDD1-85B678F883F9}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{9B18784E-1BF2-47D1-BDD1-85B678F883F9}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE