API fuzzer compiles with new error handling

BUILD

Makefile

binding.gyp

build.yaml

config.m4

gRPC.podspec

grpc.gemspec

package.xml

src/core/lib/iomgr/error.c

src/python/grpcio/grpc_core_dependencies.py

test/core/end2end/fuzzers/api_fuzzer.c

test/core/iomgr/endpoint_tests.c

test/core/security/oauth2_utils.c

test/core/util/mock_endpoint.c

test/core/util/passthru_endpoint.c

test/core/util/port_server_client.c

tools/doxygen/Doxyfile.core.internal

tools/run_tests/sources_and_headers.json

vsprojects/vcxproj/grpc/grpc.vcxproj

vsprojects/vcxproj/grpc/grpc.vcxproj.filters