See if %3b does anything?

Author: jonathanpeppers

src/Xamarin.Android.Build.Tasks/Tests/Xamarin.ProjectTools/Common/Builder.cs

@@ -275,7 +275,7 @@ protected bool BuildInternal (string projectOrSolution, string target, string []
 
 			var logger = buildLogFullPath == null
 				? string.Empty
-				: string.Format ("/noconsolelogger \"/flp1:LogFile={0};Encoding=UTF-8;Verbosity={1}\"",
+				: string.Format ("/noconsolelogger \"/flp1:LogFile={0}%3bEncoding=UTF-8%3bVerbosity={1}\"",
 					buildLogFullPath, Verbosity.ToString ().ToLower ());
 
 			var start = DateTime.UtcNow;

src/Xamarin.Android.Build.Tasks/Tests/Xamarin.ProjectTools/Common/DotNetCLI.cs

@@ -147,7 +147,7 @@ List<string> GetDefaultCommandLineArgs (string verb, string target = null, strin
 				verb,
 				$"\"{projectOrSolution}\"",
 				"/noconsolelogger",
-				$"/flp1:LogFile=\"{BuildLogFile}\";Encoding=UTF-8;Verbosity={Verbosity}",
+				$"/flp1:LogFile=\"{BuildLogFile}\"%3bEncoding=UTF-8%3bVerbosity={Verbosity}",
 				$"/bl:\"{Path.Combine (testDir, $"{binlog}.binlog")}\""
 			};
 			if (!string.IsNullOrEmpty (target)) {