Windows: addind -Djna.nosys=true to launcher options

reapply patch arduino#2301
this patch got lost with f6546ae and its partial revert 98eb1a9

Should fix arduino#5092

Author: facchinm

build/windows/launcher/config.xml

@@ -57,6 +57,7 @@
     <runtimeBits>32</runtimeBits>
     <opt>-splash:"%EXEDIR%/lib/splash.png"</opt>
     <opt>-Dsun.java2d.d3d=false</opt>
+    <opt>-Djna.nosys=true</opt>
     <opt>-DAPP_DIR="%EXEDIR%"</opt>
   </jre>
   <versionInfo>

build/windows/launcher/config_debug.xml

@@ -56,6 +56,7 @@
     <path>java</path>
     <runtimeBits>32</runtimeBits>
     <opt>-Dsun.java2d.d3d=false</opt>
+    <opt>-Djna.nosys=true</opt>
     <opt>-DAPP_DIR="%EXEDIR%"</opt>
     <opt>-DDEBUG=true</opt>
   </jre>