platform=avr added to all boards in hardware/arduino/boards.txt
platform=avr added to all boards in hardware/arduino/boards.txt


Former-commit-id: 499d613056489b0b3858740f45ad9aa58c939095

adamwolf/chipKIT-core,ricklon/chipKIT-core,chipKIT32/chipkit-core,pontech/chipKIT-core,EmbeddedMan/chipKIT-core,ricklon/chipKIT-core,EmbeddedMan/chipKIT-core,adamwolf/chipKIT-core,majenkotech/chipKIT-core,ricklon/chipKIT-core,UECIDE/chipKIT-core,EmbeddedMan/chipKIT-core,ricklon/chipKIT-core,pontech/chipKIT-core,majenkotech/chipKIT-core,EmbeddedMan/chipKIT-core,chipKIT32/chipkit-core,adamwolf/chipKIT-core,EmbeddedMan/chipKIT-core,majenkotech/chipKIT-core,UECIDE/chipKIT-core,chipKIT32/chipkit-core,majenkotech/chipKIT-core,ricklon/chipKIT-core,ricklon/chipKIT-core,majenkotech/chipKIT-core,pontech/chipKIT-core,chipKIT32/chipkit-core,pontech/chipKIT-core,pontech/chipKIT-core,EmbeddedMan/chipKIT-core,adamwolf/chipKIT-core,pontech/chipKIT-core,UECIDE/chipKIT-core,UECIDE/chipKIT-core,pontech/chipKIT-core,chipKIT32/chipkit-core,adamwolf/chipKIT-core,UECIDE/chipKIT-core,EmbeddedMan/chipKIT-core,adamwolf/chipKIT-core,majenkotech/chipKIT-core,adamwolf/chipKIT-core,majenkotech/chipKIT-core