Revert "No need to signal the shader the AMD_vertex_shader_layer is enabled"

This reverts commit 2e0bec57570c27a37630e98a721a79127ea6e7f5.
Do not undefine builtin macros.
Fixed crash in debug mode when command line option -N is used.
Allow command line options --kart and --track to select locked tracks.
This will allow reviewers to post screenshot of new tracks.