opentracker: move libowfat to separate formulae

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
opentracker: added several compile time tunables.

Added options in same order as they defined in Makefile.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
opentracker: use proper libowfat headers path

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
opentracker: modernize