AVR recipe.ar.pattern backwards compatibility
AVR recipe.ar.pattern backwards compatibility

Define archive_file_path in Arduino AVR Boards platform.txt to provide
backwards compatibility with IDE versions previous to 1.6.6. The
archive_file_path value set in platform.txt is overridden in IDE 1.6.6+.
This produces avr-ar commands identical to the previous behavior.

NicoHood/Arduino,Chris--A/Arduino,PaoloP74/Arduino,majenkotech/Arduino,nandojve/Arduino,PaoloP74/Arduino,majenkotech/Arduino,me-no-dev/Arduino-1,Chris--A/Arduino,nandojve/Arduino,PaoloP74/Arduino,majenkotech/Arduino,bsmr-arduino/Arduino,me-no-dev/Arduino-1,Chris--A/Arduino,Chris--A/Arduino,PaoloP74/Arduino,NicoHood/Arduino,NicoHood/Arduino,tbowmo/Arduino,stickbreaker/Arduino,stickbreaker/Arduino,tbowmo/Arduino,bsmr-arduino/Arduino,NicoHood/Arduino,NicoHood/Arduino,me-no-dev/Arduino-1,PaoloP74/Arduino,me-no-dev/Arduino-1,PaoloP74/Arduino,tbowmo/Arduino,bsmr-arduino/Arduino,bsmr-arduino/Arduino,Chris--A/Arduino,Chris--A/Arduino,Chris--A/Arduino,me-no-dev/Arduino-1,nandojve/Arduino,nandojve/Arduino,NicoHood/Arduino,PaoloP74/Arduino,nandojve/Arduino,majenkotech/Arduino,nandojve/Arduino,stickbreaker/Arduino,Chris--A/Arduino,me-no-dev/Arduino-1,nandojve/Arduino,tbowmo/Arduino,nandojve/Arduino,bsmr-arduino/Arduino,tbowmo/Arduino,NicoHood/Arduino,me-no-dev/Arduino-1,PaoloP74/Arduino,stickbreaker/Arduino,tbowmo/Arduino,NicoHood/Arduino,tbowmo/Arduino,majenkotech/Arduino,me-no-dev/Arduino-1,stickbreaker/Arduino,bsmr-arduino/Arduino,bsmr-arduino/Arduino,majenkotech/Arduino,tbowmo/Arduino,stickbreaker/Arduino,stickbreaker/Arduino,majenkotech/Arduino,bsmr-arduino/Arduino