Use symbolic constants names in the generated wxSTC files.

Update the script generating stc.cpp to put the symbolic constants names and
not their raw numeric values into the generated code. This makes it much
easier to read and understand.

Closes #15783.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75443 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Update the generated file after gen_iface.py change.

Regenerate the file to use the symbolic constants instead of the raw values.

See #15783.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75444 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775