yuga: light: write to /dev/null instead of foo

Change-Id: I3ef6c2fcf3b78a61ae16f333f84e3a177547e970
yuga: move prop scripts to common

Change-Id: I558c58aedc23ccbeb69ae349a6dfd005706a87f7
yuga: update prop scripts

Change-Id: Ic4fd444b394236a47b41add6a549edc4b52bda2e