We have at least three different external build definitions for the fuzzers. That's enough that requiring each of them account for the split fuzzer mode is probably too much turbulence. Change-Id: I96dbb12a2b4f70bfa1b04cd0d15fda918bbf51d6 Reviewed-on: https://boringssl-review.googlesource.com/12183 Commit-Queue: David Benjamin <davidben@google.com> Reviewed-by: Adam Langley <agl@google.com>kris/onging/CECPQ3_patch15