added xstartup files

Author: SaicharanKandukuri

etc/proot-env/vnc/xstartup

@@ -0,0 +1,5 @@
+#!/bin/bash
+unset SESSION_MANAGER
+unset DBUS_SESSION_BUS_ADRESS
+export PULSE_SERVER=127.0.0.1
+exec startxfce4

etc/proot-env/vnc/xstartup-hdpi

@@ -0,0 +1,8 @@
+#!/bin/bash
+unset SESSION_MANAGER
+unset DBUS_SESSION_BUS_ADRESS
+export PULSE_SERVER=127.0.0.1
+export GDK_SCALE=2
+export XCURSOR_SIZE=48
+export QT_SCALE_FACTOR=2
+exec startxfce4