CIFuzz of libsrtp fails bad_build_check with "Invalid argument: --"

see: https://github.com/cisco/libsrtp/issues/780

This started failing and am not sure where the problem lies.
It can be reproduced locally with:
`python3 infra/helper.py check_build libsrtp`
Can see tat the "--" aregument is passed to the fuzzer.
`/tmp/not-out/tmp8l21qytj/srtp-fuzzer -- -rss_limit_mb=2560....`
Running manually from the container after using `python3 infra/helper.py shell libsrtp` and the same command line has the same result, if I try without the "--" then it appears to work fine.
I have not be able to determine if it is a configuration problem or what. Any help would be appreciated.