fixing local coreclr path

docs/Linux.md

@@ -20,7 +20,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <packageSources>
-    <add key="local coreclr" value="~/git/packages/Debug/NonShipping" />
+    <add key="local coreclr" value="../../git/packages/Debug/NonShipping" />
     <add key="nuget.org" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />
   </packageSources>
 </configuration>
@@ -73,4 +73,4 @@ cd DotnetCoreSampleProject
 dotnet restore
 dotnet build
 dotnet run
-```
+```