Rationale:
This if "hides" the dart_libfuzzer target for
build targets that do not support the fuzzer tool
(e.g. no asan, ia32, etc.). This makes "build all"
possible again, and yields "unknown target 'dart_libfuzzer'"
for unsupported case. Also updates README accordingly
and fixes some formatting.
https://github.com/dart-lang/sdk/issues/36774
Change-Id: I61d85ae00d13a0eda3818d40b992cd81f5ee0357
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/100630
Commit-Queue: Aart Bik <ajcbik@google.com>
Reviewed-by: Alexander Aprelev <aam@google.com>
Aart Bik