integration_tests: fixture: Set kernel path after extra arguments
integration_tests: fixture: Set kernel path after extra arguments

BUG=none
TEST=./integration_tests/run

Change-Id: I1036161ce6b3e3348c7a672b6a58cfacbf1b4ddd
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/3820964
Reviewed-by: Dennis Kempin <cd09796fb571bec2782819dbfd33307f65b1c778@google.com>
Tested-by: Keiichi Watanabe <815e4e8f7c92a23424d7c3f51ead622bcedbc720@chromium.org>
Commit-Queue: Keiichi Watanabe <815e4e8f7c92a23424d7c3f51ead622bcedbc720@chromium.org>

google/crosvm,google/crosvm,google/crosvm,google/crosvm