-opengl dynamic should work with -angle-d3d11

The following config line should allow building Qt for Windows with dynamic OpenGL and ANGLE's D3D11 renderer:

configure -angle-d3d11 -opengl dynamic

However, that config line will give the following error:

ERROR: Dynamic OpenGL cannot be used together with native Angle (GLES2) builds.

Note that WinRT builds should still prevent that combination, as dynamic GL is not supported under WinRT.