Debugging symbols (dbgsym) packages are missing GDB kernel scripts

[Krzysztof Kozlowski]

[Impact]

 * Linux kernel comes with useful GDB scripts under scripts/gdb.
 * These bring new commands helping in debugging like lx-clk-summary, lx-cpus, lx-device-list-tree, lx-genpd-summary, lx-symbols, lx-timerlist and more
 * It would be useful to have them installed in dbgsym package.

[Test Plan]

 * Build package with and without skipdbg.
 * Check if GDB scripts are installed in /usr/lib/debug/share

[Where problems could occur]

 * This is packaging and Makefile change, so no particular runtime issues expected. Most likely any problem will be build time.
 * Wrong packaging could lead to missing files in dbgsym package.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1928715

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!