Merged all regression tests except imperas linux boot into testbench.sv.

Created by: rosethompson

• added branch predictor configs with embench to nightly.
• Increased timeout for nighly regressions.
• Rough draft removal of duplicate BPBTAWrongE logic.
• Fixed bugs in the regression-wally script required for branch predictor sweeps.
• Ugh. This is getting frustrating. Can't seem to get embench to run correctly in new script.
• Ugh. I can't seem to get questa to set the top level parameters anymore.
• Finally have regression-wally -nightly producing branch predictor results.
• Updated branch predictor derivative configs.
• Added makefile rule to build the embench benchmarks.
• Added coremark to benchmarks.
• First cut at removing the linux testbench and merging build root into the main testbench.
• Moved buildroot testbench to the main testbench. However I don't have a positive control or negative indicator to say when the test completes or passes.
• Updated comments in do file.
• Fixed paths to buildroot objdump label and addr files.
• Buildroot now reports every 100K instructions as before.
• Only output instruction count when the csrs are implemented.
• Fixed issue with branch deriv configs.
• All regression tests run using the main testbench.sv script now. Still need to remove configOptions.