ttf-roboto: add recipe
Roboto is an Apache licensed sans-serif typeface family developed by Google as
the system font for its mobile operating system Android, and released in 2011
for Android 4.0 "Ice Cream Sandwich".
Signed-off-by: Diego Rondini <diego.rondini@kynetics.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>