* commit '794e886715143e2c48c9f69ed1adc2517a5541b1': doc change: update glibc/ubuntu min req for sdk. Add info about emulator performance.
* commit '794e886715143e2c48c9f69ed1adc2517a5541b1': doc change: update glibc/ubuntu min req for sdk. Add info about emulator performance.