gem5: update to ccee3283341454c4480eadd568b010857a044d1a

cirosantilli · cirosantilli · commit 2581068a59bb · 2021-01-15T00:00:00.000Z
Kernel boot 5.9 works on gem5 aarch64 now.
diff --git a/submodules/gem5 b/submodules/gem5
@@ -1 +1 @@
-Subproject commit b2847f43c91e27f43bd4ac08abd528efcf00f2fd
+Subproject commit ccee3283341454c4480eadd568b010857a044d1a
