support CuSparseMatrix(::Diagonal)

[Roger-luo]

No description provided.

[codecov]

Codecov Report

Merging #1470 (0a80268) into master (f522010) will decrease coverage by 0.69%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1470      +/-   ##
==========================================
- Coverage   77.31%   76.61%   -0.70%     
==========================================
  Files         120      120              
  Lines        9265     9271       +6     
==========================================
- Hits         7163     7103      -60     
- Misses       2102     2168      +66     

Impacted Files	Coverage Δ
lib/cusparse/conversions.jl	90.94% <100.00%> (+0.19%)	⬆️
lib/cudnn/CUDNN.jl	37.50% <0.00%> (-35.94%)	⬇️
lib/cublas/CUBLAS.jl	50.00% <0.00%> (-25.44%)	⬇️
src/utilities.jl	68.91% <0.00%> (-4.06%)	⬇️
lib/cudadrv/CUDAdrv.jl	51.66% <0.00%> (-3.34%)	⬇️
lib/cudadrv/module/linker.jl	68.75% <0.00%> (-3.13%)	⬇️
lib/cudadrv/state.jl	77.84% <0.00%> (-2.28%)	⬇️
lib/cudadrv/memory.jl	78.59% <0.00%> (-1.01%)	⬇️

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[maleadt]

Thanks!