cargo2rulesmk.py: ignore target-specific dependencies

The trusty rules.mk files should be target agnostic so
we simply ignore any dependencies that are specific to
a given target.

Bug: 306066627
Test: manually, run cargo2rulesmk.py for half crate
Change-Id: I06efaa9d59b57c071a639a7ff6dbc3146529573e
1 file changed