gdbgui: init at 0.9.0.1

Feature rich browser-based frontend with data structure visualizations
(like DDD), and gdb terminal access. Compatible with C, C++, golang,
Rust, fortran. Written in Python and JavaScript

gdbgui is at the top of the GDB Front Ends
list on https://sourceware.org/gdb/wiki/GDB%20Front%20Ends