libbinder: Fix __assert macro in Trusty

Override the definition of __assert from the
binder_status.h header when building without bionic.
The definition in that header uses syslog() to
print the assertion message, and this function
is not available in Trusty.

Bug: 230135749
Test: m
Test: build on Trusty
Change-Id: I3fe849a021110f78127f70017bff0f1bad868500