Include objdump failures in test output.
Include objdump failures in test output.

We log a warning if objdump fails, but this appears in the build log, not test
log, which can make it hard to notice.

Include it with the actual escape output as context on "(possible)" to make it
more clear when something is wrong.

PiperOrigin-RevId: 350355759

google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor