fix incorrect folder name for julia-0.6.x

Former-commit-id: ef2c7401e0876f22d2f7762d182cfbcd5a7d9c70

julia-0.6.3/share/julia/test/bigfloat.jl

@@ -0,0 +1,11 @@
+# This file is a part of Julia. License is MIT: https://julialang.org/license
+
+@test big(2.0)^big(3) == 8
+
+for T in [Int8, UInt8, Int16, UInt16, Int32, UInt32, Int64, UInt64, Int128, UInt128, BigInt]
+    @test T(2)^big(3.0) == 8
+    @test big(2.0)^T(3) == 8
+end
+
+# issue 15659
+@test (setprecision(53) do; big(1/3); end) < 1//3