update path for core tests
Created by: dawidzim
Hey! In this pull request i correct path to CORE_TEST and added core tests for Riviera-PRO: core_tests = ['misalign', 'illegal', 'dhrystone', 'fibonacci', 'riscv_ebreak_test_0'] Signed-off-by: Dawid Zimonczyk dawidz@aldec.com.pl