Add 6.1 for default CUDA_ARCH_BIN

[jasjuang]

Currently after cloning the latest repo and do

ccmake ..

In the CUDA_ARCH_BIN section it by defaults only shows 3.0 3.5 5.0 5.2. I suggest adding in 6.1 for the newest Pascal GPUs that recently comes out.

[UnaNancyOwen]

@jasjuang I sent a pull request. Please check it.

[jasjuang]

@UnaNancyOwen Thanks for creating the pull request, I believe cuda compatibility 8.0 does not exist as shown in here, the newest seems to be 7.1. That might be the reason that the pull request doesn't pass travis CI.

[UnaNancyOwen]

@jasjuang "8.0" is CUDA SDK version.
Compute Capability 6.x (Pascal) is supported from CUDA SDK 8.0 and later.

This PR is not cause the test fails.
The problem of test is being discussed here (#1785).

[jasjuang]

oh I see you are right, hope they merge your PR soon!

[UnaNancyOwen]

@jasjuang Thank you for checking!

[jspricke]

Done, thx!