assembly only risc v test. Used other repo to get an idea for creating a makefile

https://github.com/dwelch67/sifive_samples/blob/master/hifive1b/blinker01/Makefile

compile instructions: -Make sure your toolchain is linked so that the binaries can be accessed in the user's path -run make and upload .hex file to revb board

compatibily: Only supports sifive-hifive1-revb