tests: Move HLSL tests to a subdirectory.

Approved-by: Giovanni Mascellani (@giomasce)
Approved-by: Francisco Casas (@fcasas)
Approved-by: Henri Verbeet (@hverbeet)
Approved-by: Alexandre Julliard (@julliard)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/248

tests/hlsl/log.shader_test

@@ -0,0 +1,38 @@
+[pixel shader]
+uniform float4 x;
+
+float4 main() : sv_target
+{
+    return log2(x);
+}
+
+[test]
+uniform 0 float4 2.0 4.0 5.0 0.4
+draw quad
+probe all rgba (1.0, 2.0, 2.32192802, -1.32192802) 1
+
+[pixel shader]
+uniform float4 x;
+
+float4 main() : sv_target
+{
+    return log10(x);
+}
+
+[test]
+uniform 0 float4 10.0 100.0 1.0 0.1
+draw quad
+probe all rgba (1.0, 2.0, 0.0, -1.0) 1
+
+[pixel shader]
+uniform float4 x;
+
+float4 main() : sv_target
+{
+    return log(x);
+}
+
+[test]
+uniform 0 float4 3.0 10.0 1.0 0.1
+draw quad
+probe all rgba (1.0986123, 2.302585, 0.0, -2.302585) 2