Build issue because of a absolute path in LanguageManager.tt

[veler]

Unable to build the solution when the developer doesn't have Visual Studio 2017 Enterprise edition or didn't installed it at the default location.

Error An exception was thrown while trying to compile the transformation code. The following Exception was thrown: System.IO.FileNotFoundException: Could not find a part of the path 'C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\Common7\IDE\PublicAssemblies\Microsoft.VisualStudio.Shell.Interop.dll'. File name: 'C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\Common7\IDE\PublicAssemblies\Microsoft.VisualStudio.Shell.Interop.dll' ---> System.IO.DirectoryNotFoundException: Could not find a part of the path 'C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\Common7\IDE\PublicAssemblies\Microsoft.VisualStudio.Shell.Interop.dll'. at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)