fix(debug): Fix breakpoints in the debug build. (#548)

Breakpoints in VS and VSCode do not work with anonymized paths, so this
limits that to the release build.

Author: shpaass

Directory.Build.props

@@ -1,5 +1,5 @@
 <Project>
   <PropertyGroup Label="Normalise stack trace file locations">
-    <PathMap>$([System.IO.Path]::GetFullPath('$(MSBuildThisFileDirectory)'))=.</PathMap>
+    <PathMap Condition="'$(Configuration)'=='Release'">$([System.IO.Path]::GetFullPath('$(MSBuildThisFileDirectory)'))=.</PathMap>
   </PropertyGroup>
 </Project>