Purge warnings from buildok testsuite.

Purge warnings from buildok testsuite.

* testsuite/buildok/fortysix.stp: Add -w.
* testsuite/buildok/fortytwo.stp: Likewise.
* testsuite/buildok/four.stp: Avoid empty begin.
* testsuite/buildok/memory-all-probes.stp: Add -w.
* testsuite/buildok/nfsd-all-probes.stp: Likewise.
* testsuite/buildok/nine.stp: Likewise.
* testsuite/buildok/one.stp: Use q.
* testsuite/buildok/printf.stp: Remove unused foo(), printf x.
* testsuite/buildok/process-all-probes.stp: Add -w.
* testsuite/buildok/scheduler-all-probes.stp: Likewise.
* testsuite/buildok/scsi-all-probes.stp: Likewise.
* testsuite/buildok/signal-all-probes.stp: Likewise.
* testsuite/buildok/sixteen.stp: log in foo().
* testsuite/buildok/socket-all-probes.stp: Add -w.
* testsuite/buildok/stat_insert.stp: Declare x, y global.
* testsuite/buildok/syscall.stp: Add -w.
* testsuite/buildok/tcp-all-probes.stp: Likewise.
* testsuite/buildok/thirtyone.stp: Likewise.
* testsuite/buildok/twentyeight.stp: log absolute.
* testsuite/buildok/twentyfour.stp: Add -w.
* testsuite/buildok/udp-all-probes.stp: Likewise.
* testsuite/buildok/vfs-all-probes.stp: Likewise.