build: trusty-std: only set MODULE_ADD_IMPLICIT_DEPS := false in userspace

`trusty-std` depends on `core`, but not `std`.
`core` is implicit in the kernel, while `std` is implicit in userspace.
So we must only set `MODULE_ADD_IMPLICIT_DEPS := false` in userspace.

Test: build.py
Bug: 304850822
Change-Id: Id9a3b57ab62ba4f825c49799ef55b1f67281ed8e
1 file changed