The shared libraries for the FfiBoringssl benchmark had been moved up a
level but unfortunately the same change wasn't made for the FfiCall
benchmark.
The IsolateJson benchmark had a typo in the path and broke.
Change-Id: Iec2fec1d5508022d9cfbfb040d80c74b078a0640
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/150024
Reviewed-by: William Hesse <whesse@google.com>
Jonas Termansen