Contribution description

The tramp assembly was missing a .note.GNU-stack section, meaning the compiler was forced to assume that we require an executable stack.

Fix this by adding the necessary section.

Testing procedure

Build:
make BOARD=native -C tests/core/thread_basic flash test

main(): This is RIOT! (Version: 2024.04-devel-20-gd04df-exec_stack)
first thread

{ "threads": [{ "name": "idle", "stack_size": 8192, "stack_used": 436 }]}
{ "threads": [{ "name": "main", "stack_size": 12288, "stack_used": 2452 }]}
second thread

{ "threads": [{ "name": "nr2", "stack_size": 12288, "stack_used": 736 }]}