netkvm: Fix build break with WDK 10.0.15063.0

stampinf.exe in the latest Win10 WDK appears to have a bug and writes
out an empty DriverVer= directive when passed a command line like below:

  stampinf -f <inf> -a <arch> -v <version>

Adding -d seems to work around it:

  stampinf -f <inf> -a <arch> -v <version> -d *

Signed-off-by: Ladi Prosek <lprosek@redhat.com>

NetKVM/NetKVM-VS2015.vcxproj

@@ -360,7 +360,7 @@
       <Command>
         copy /Y $(ProjectDir)\$(SourceInfFile) $(OutDir)\netkvm.inf
         echo "Copy: "$(ProjectDir)\$(SourceInfFile)
-        stampinf -f $(OutDir)\netkvm.inf -a $(InfArch) -v $(STAMPINF_VERSION)
+        stampinf -f $(OutDir)\netkvm.inf -a $(InfArch) -v $(STAMPINF_VERSION) -d *
       </Command>
       <Message>Copy correct INF and stamp it</Message>
     </PreBuildEvent>