Get rid of warnings with CUDA
Get rid of warnings with CUDA

I stumbled upon trilinos/Trilinos#1888 and turns out we were passing
the `--expt-extended-lambda` flag wrong in our configuration scripts.

This patch gets rid of those silly warnings:
```
cc1: warning: command line option '-std=c++11' is valid for C++/ObjC++ but not for C
```

dalg24/DataTransferKit,Rombur/DataTransferKit,dalg24/DataTransferKit,ORNL-CEES/DataTransferKit,Rombur/DataTransferKit,dalg24/DataTransferKit,Rombur/DataTransferKit,Rombur/DataTransferKit,ORNL-CEES/DataTransferKit,ORNL-CEES/DataTransferKit,dalg24/DataTransferKit,ORNL-CEES/DataTransferKit