Add AssemblyNativeVersion

Author: josesimoes

source/nanoFramework.System.Net.Http/Properties/AssemblyInfo.cs

@@ -10,6 +10,10 @@
 [assembly: AssemblyProduct("System.Net.Http")]
 [assembly: AssemblyCopyright("Copyright © nanoFramework Contributors 2018")]
 
+////////////////////////////////////////////////////////////////
+// update this whenever the native assembly signature changes //
+[assembly: AssemblyNativeVersion("1.0.5.0")]
+////////////////////////////////////////////////////////////////
 
 // Setting ComVisible to false makes the types in this assembly not visible 
 // to COM components.  If you need to access a type in this assembly from