[arch-general] Generating gdb debug logs for devs

[Neven Sajko]

A few notes:

You can use, eg., the file command to check if executables are stripped.
(with something like "file /bin/executable")
But gdb already tells you that no debugging symbols were found for the
executable.

Thus, you either need install an lxrandr package with debugging
symbols (with -g and unstripped),
or (if you splitted out the debugging symbols during the build)
install lxrandr together with its split debugging symbols.