Add font rename script to rename one font only.

This change adds a script that renames only font at a time. This helps
in writing better Makefile rules and passes the job for parallelization
to the make rather than doing it in python which doesn't support ctrl-c
properly.

Change-Id: Icd380e3cc5d744260d6a9f497aa65a1a6c829c2e
1 file changed