allows use of "myboard.build.pid" in boards.txt
allows use of "myboard.build.pid" in boards.txt

3rd party boards that use sam core can have their own USB product ID that is defined in "boards.txt"
majenkotech/Arduino,Chris--A/Arduino,tbowmo/Arduino,Chris--A/Arduino,Chris--A/Arduino,PaoloP74/Arduino,NicoHood/Arduino,PaoloP74/Arduino,stickbreaker/Arduino,me-no-dev/Arduino-1,Chris--A/Arduino,majenkotech/Arduino,bsmr-arduino/Arduino,stickbreaker/Arduino,NicoHood/Arduino,bsmr-arduino/Arduino,majenkotech/Arduino,NicoHood/Arduino,Chris--A/Arduino,me-no-dev/Arduino-1,bsmr-arduino/Arduino,NicoHood/Arduino,nandojve/Arduino,nandojve/Arduino,tbowmo/Arduino,majenkotech/Arduino,nandojve/Arduino,me-no-dev/Arduino-1,tbowmo/Arduino,nandojve/Arduino,tbowmo/Arduino,stickbreaker/Arduino,stickbreaker/Arduino,Chris--A/Arduino,bsmr-arduino/Arduino,PaoloP74/Arduino,Chris--A/Arduino,me-no-dev/Arduino-1,NicoHood/Arduino,nandojve/Arduino,NicoHood/Arduino,tbowmo/Arduino,me-no-dev/Arduino-1,PaoloP74/Arduino,nandojve/Arduino,tbowmo/Arduino,me-no-dev/Arduino-1,nandojve/Arduino,PaoloP74/Arduino,me-no-dev/Arduino-1,NicoHood/Arduino,bsmr-arduino/Arduino,tbowmo/Arduino,nandojve/Arduino,NicoHood/Arduino,majenkotech/Arduino,tbowmo/Arduino,PaoloP74/Arduino,Chris--A/Arduino,PaoloP74/Arduino,majenkotech/Arduino,PaoloP74/Arduino,stickbreaker/Arduino,bsmr-arduino/Arduino,stickbreaker/Arduino,bsmr-arduino/Arduino,majenkotech/Arduino,stickbreaker/Arduino,bsmr-arduino/Arduino,me-no-dev/Arduino-1