Merge pull request SciML#815 from ChrisRackauckas-Claude/add-butterfly-tests

Add missing butterfly.jl test to runtests.jl

Author: ChrisRackauckas

test/runtests.jl

@@ -19,6 +19,7 @@ if GROUP == "All" || GROUP == "Core"
     @time @safetestset "Traits" include("traits.jl")
     @time @safetestset "Verbosity" include("verbosity.jl")
     @time @safetestset "BandedMatrices" include("banded.jl")
+    @time @safetestset "Butterfly Factorization" include("butterfly.jl")
     @time @safetestset "Mixed Precision" include("test_mixed_precision.jl")
 end