Merge pull request #4297 from ctiller/hpack-tests

Makefile

src/core/iomgr/endpoint_pair_posix.c

src/core/transport/chttp2/hpack_parser.c

test/core/bad_client/gen_build_yaml.py

test/core/bad_client/tests/headers.c

tools/run_tests/sources_and_headers.json

tools/run_tests/tests.json

vsprojects/buildtests_c.sln

...t/headers_bad_client_test/headers_bad_client_test.vcxproj

...s_bad_client_test/headers_bad_client_test.vcxproj.filters