getloadavg test: skip the test on GNU/Linux without /proc mounted GNU libc implements getloadavg(3) on Linux by parsing /proc/loadavg file. When /proc is not mounted, it always fails with ENOENT. * tests/test-getloadavg.c (main): Treat ENOENT return code from getloadavg(3) the same way as ENOSYS and ENOTSUP.