The utils header is a large collection of functionality for several
system headers and API. This splits out the ones from sys/time.h into
a separate header reducing the need for many unconnected source files
to include the system header unecessarily.
Previously this information was logged when netsurf_init was called
which might be many lines out output into the log.
It is useful to have this information at the beginning of the log to
make it easily found. In addition it makes netsurf_init less complex.
This reduces logging overhead by only calling the log output function
once instead of three times.
Additionally the nslog_gettime interface no longer needs to be
exported and the static function is directly inlined further reducing
function call overhead.
Finally the appending of a newline uses fputc instead of a full printf
call which is considerably more simple and further reduces overhead
time.
