[cc/sanitize] Re-enable new pass manager for fuzzer targets

Bug: http://b/133876586

This was turned off but the upstream change fixing this has been long
part of the Android toolchain.

Test: Output of
  m aidl_parser_fuzzer; readelf aidl_parser_fuzzer | grep -c sancov
hasn't changed.

Change-Id: Id7edd7ac5791b0e031fd4af46381acdbb1b80d47