crosvm_control: Add cbindgen configuration options
crosvm_control: Add cbindgen configuration options

Adds necessary configuration to cbindgen to correctly format the
generated crosvm_control.h header.

BUG=b:188858559
TEST=cq

Change-Id: I7abab7a5f9d260451540c5938719ec51cad56457
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3713865
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>
Commit-Queue: Kameron Lutes <d812b9f24eeb5acef9cc7e601b6b603be1696a90@chromium.org>
Reviewed-by: Alexandre Courbot <301cd6a3ea50a894b4b51e385c5eb12b9a4ffc0c@chromium.org>

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