misc: Generate StateMachine debug includes in deterministic order
misc: Generate StateMachine debug includes in deterministic order

Since 3454a4a36e927f483b36fa66baabe2c85ecf3ddc the order of the debug/
includes is non-deterministic which can result in unnecessary rebuilds.

Change-Id: I583d2caf70632e08fa59ac85073786270991edbc
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/54983
Reviewed-by: Jason Lowe-Power <92de577f37050ad05b60626d2f17913f40dcb1a2@gmail.com>
Maintainer: Jason Lowe-Power <92de577f37050ad05b60626d2f17913f40dcb1a2@gmail.com>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>

gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5