This patch to libgo sorts the generated libgo.sum and libgo.log files
into a consistent order.  This will make it easier to compare them over
time.  It also now reports the net and syslog tests as UNTESTED when
GCCGO_RUN_ALL_TESTS is not defined, rather than just skipping them.
Bootstrapped and ran Go testsuite on x86_64-unknown-linux-gnu.
Committed to mainline.

Ian