Add local project file location to exception when parsing fails

Helps in solutions with multiple projects, when one of csproj files
becomes corrupt. User knows where to apply fixes.

Author: Dmitry Avtonomov

src/GitVersion.Core/VersionConverters/AssemblyInfo/ProjectFileUpdater.cs

@@ -47,7 +47,15 @@ public void Execute(VersionVariables variables, AssemblyInfoContext context)
             var localProjectFile = projectFile.FullName;
 
             var originalFileContents = this.fileSystem.ReadAllText(localProjectFile);
-            var fileXml = XElement.Parse(originalFileContents);
+            XElement fileXml;
+            try
+            {
+                fileXml = XElement.Parse(originalFileContents);
+            }
+            catch (XmlException e)
+            {
+                throw new XmlException($"Unable to parse file as xml: {localProjectFile}", e);
+            }
 
             if (!CanUpdateProjectFile(fileXml))
             {