Merge pull request #5088 from murgatroid99/core_long_int64_t

include/grpc/impl/codegen/time.h

src/core/iomgr/iocp_windows.c

src/core/iomgr/pollset_posix.c

src/core/support/stack_lockfree.c

src/core/support/time.c

src/node/ext/timeval.cc

src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi

src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi

src/python/grpcio/grpc/_cython/cygrpc.pyx

src/python/grpcio/grpc/_cython/imports.generated.h

src/ruby/ext/grpc/rb_grpc_imports.generated.h

test/core/statistics/census_log_tests.c

test/core/support/sync_test.c

test/core/support/time_test.c

test/core/transport/chttp2/timeout_encoding_test.c

test/core/util/test_config.h

test/cpp/qps/client_async.cc

test/cpp/qps/driver.h

test/cpp/util/time_test.cc

test/distrib/python/distribtest.py