Michał Kępień a73ab08e75 Improve reporting for barrier errors ...

uv_barrier_init() errors are currently ignored.  Use UV_RUNTIME_CHECK()
to catch them and to improve error reporting for any uv_barrier_init()
run-time failures (by augmenting error messages with file/line
information and the error string corresponding to the value returned).

-

..

isc

Improve reporting for barrier errors

-

.clang-format

…