Add value for 'sed -i' parameter

Some versions of sed (MacOS and maybe BSD) show error if value for '-i'
parameter is missed. Without this change we can not run
'make version-yaml' on these OSes.

Change-Id: Ib81befbe302c9cb25c4bf67e45ae5dd90d58009a
Merge "Add value for 'sed -i' parameter"