ttf-pt-sans: add recipe

PT Sans is an open source licensed font released in 2010 by ParaType.
The ParaTypeFFL-1.3 license file has been submitted to OE-core.

Signed-off-by: Ioan-Adrian Ratiu <adrian.ratiu@ni.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>