Add nanosleep and usleep Windows shims
This commit adds POSIX nanosleep() and usleep() shim implementation for Windows to help implementors use less #ifdef _WIN32 in the code.
(cherry picked from commit c37ff5d1)
This commit adds POSIX nanosleep() and usleep() shim implementation for Windows to help implementors use less #ifdef _WIN32 in the code.
(cherry picked from commit c37ff5d1)