apple m1 support

[tolya-yanot]

By @doronaviguy

Old PR - newton-blockchain#59

This PR includes the following

1. detecting arm based apple devices and passing the right value to clang complier
2. in case of ARM processor we are declaring the cpp version to be 14 set(CMAKE_CXX_STANDARD 14)
3. changing the clang flag from march to mcpu and pass the right flag based on the system architecture, in case of an apple arm based processor we are passing -mcpu=apple-m14.

Tested on apple both arm and non arm cpus

[EmelyanenkoK]

Close in favor #385