Makefile: allow compilation with CUDA
Makefile: allow compilation with CUDA

To link view to a bart version compiled with CUDA support, view also
needs to link with CUDA.

Further, to properly set CUDA_L, Makefile.local needs to set
CUDA=1 and CUDA_BASE before it is initialized in the Makefile.

uecker/view,mrirecon/view,mrirecon/view