system_get_version - get version string for system
#include <zircon/syscalls.h> zx_status_t zx_system_get_version(char version[], size_t version_size);
system_get_version() fills in the given character array with a string identifying the version of the Zircon system currently running. The provided size must be large enough for the complete string including its null terminator.
system_get_version() returns ZX_OK on success.
ZX_ERR_BUFFER_TOO_SMALL version_size is too short.