[OE-core] sprinkled references to "powerpc" vs "ppc" in adt-installer

[Robert P. J. Day]

  perusing adt-installer recipe and files and i notice there are a few
mentions of "powerpc" whereas it seems that "ppc" is the correct
architecture abbreviation.  obviously doesn't hurt anything but it
might be confusing for people reading the source.

rday

-- 

========================================================================
Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
========================================================================