[test] Add tests for SPEC-ACCEL benchmarks

[sekelle]

Please don't fry me for my creative use of the singlesource build_system. I need a separate build
step to run the provided install script, otherwise I don't have enough time for the benchmarks.
But the spec scripts don't expose any of the compilation for the build_system to take care of, so
I gave it something useless to do.
Feature request for a build_system with user defined build_cmd?

[vkarak]

@sebkelle1 Regarding your comment about the build system, we had issue #301 for creating a generic one, but we decided to close it, because you could essentially achieve any type of custom builds through the current basic build systems. So your use of the SingleSource build system with prebuild commands is not strange, especially when you have to deal with strange setups.

[pep8speaks]

Hello @sebkelle1, Thank you for updating!

Cheers! There are no PEP8 issues in this Pull Request!Do see the ReFrame Coding Style Guide

Comment last updated on January 15, 2019 at 17:30 Hours UTC

[codecov-io]

Codecov Report

Merging #618 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #618   +/-   ##
=======================================
  Coverage   91.68%   91.68%           
=======================================
  Files          74       74           
  Lines        9256     9256           
=======================================
  Hits         8486     8486           
  Misses        770      770

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[vkarak]

@teojgo Can you approve this PR?

[teojgo]

Just the small empty line thing.

[vkarak]

@jenkins-cscs retry none