Update the Part 3 config file examples in learning gem5 to resolve a warning with int_links. Some files were initializing self.int_links vector to an empty list of SimObjects. This causes a warning. The fix resolves this by initializing self.int_links to a pre-declared int_links variable. Change-Id: Iaa38a4db9cc42a949879d571d1372f0b0a456f11 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/60829 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com> Maintainer: Jason Lowe-Power <power.jg@gmail.com> Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>