updating .gitignore to include project.lock.json files
updating .gitignore to include project.lock.json files

leculver/dotnet-reliability,transsight/testproject,Lucrecious/corefx-tools,schaabs/corefx-tools,leculver/dotnet-reliability,transsight/testproject,leculver/dotnet-reliability,schaabs/corefx-tools,leculver/dotnet-reliability,schaabs/corefx-tools,Lucrecious/corefx-tools,dotnet/corefx-tools,leculver/dotnet-reliability,leculver/dotnet-reliability,Lucrecious/corefx-tools