Turn OpenCL CPU tests back on

[rok-cesnovar]

Summary

The Gelman group Linux machine is back online so we can turn these back on for when changes are done to OpenCL source files.

[rok-cesnovar]

@serban-nicusor-toptal you can disable the AWS instance now.

[serban-nicusor-toptal]

@rok-cesnovar Done.

[stan-buildbot]

---

Name	Old Result	New Result	Ratio	Performance change( 1 - new / old )
gp_pois_regr/gp_pois_regr.stan	3.49	3.43	1.02	1.76% faster
low_dim_corr_gauss/low_dim_corr_gauss.stan	0.02	0.02	0.95	-4.76% slower
eight_schools/eight_schools.stan	0.11	0.11	1.0	0.36% faster
gp_regr/gp_regr.stan	0.16	0.16	0.99	-0.99% slower
irt_2pl/irt_2pl.stan	5.32	5.32	1.0	-0.11% slower
performance.compilation	90.0	88.39	1.02	1.79% faster
low_dim_gauss_mix_collapse/low_dim_gauss_mix_collapse.stan	8.94	8.92	1.0	0.18% faster
pkpd/one_comp_mm_elim_abs.stan	30.25	31.14	0.97	-2.94% slower
sir/sir.stan	129.83	128.56	1.01	0.98% faster
gp_regr/gen_gp_data.stan	0.03	0.04	0.98	-1.93% slower
low_dim_gauss_mix/low_dim_gauss_mix.stan	3.08	3.08	1.0	-0.27% slower
pkpd/sim_one_comp_mm_elim_abs.stan	0.37	0.42	0.88	-14.28% slower
arK/arK.stan	1.91	1.91	1.0	-0.27% slower
arma/arma.stan	0.64	0.66	0.97	-3.51% slower
garch/garch.stan	0.51	0.51	1.0	0.11% faster
Mean result: 0.985621802132

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Jenkins Console Log
Blue Ocean
Commit hash: 1683769

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Machine information

ProductName: Mac OS X ProductVersion: 10.11.6 BuildVersion: 15G22010

CPU:
Intel(R) Xeon(R) CPU E5-1680 v2 @ 3.00GHz

G++:
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 7.0.2 (clang-700.1.81)
Target: x86_64-apple-darwin15.6.0
Thread model: posix

Clang:
Apple LLVM version 7.0.2 (clang-700.1.81)
Target: x86_64-apple-darwin15.6.0
Thread model: posix

[rok-cesnovar]

4h15 min for Jenkins tests is nice! 🎉