PR16716 partial fix: Fix types and nesting.

PR16716 partial fix: Fix types and nesting.

Fix types and nesting for rt_sigqueueinfo, setdomainname,
setrlimit, splice, vmsplice and tee syscalls.

* tapset/linux/syscalls2.stp: Fix types and nesting.
* tapset/linux/nd_syscalls2.stp: Fix types and nesting.
* tapset/linux/aux_syscalls.stp: Add SPLICE* defs.
* NEWS: Add deprecation note.
* testsuite/buildok/syscalls2-detailed.stp: New testcase.
* testsuite/buildok/nd_syscalls2-detailed.stp: New testcase.
* testsuite/systemtap.syscall/getrlimit.c: Updated testcase.
* testsuite/systemtap.syscall/rt_signal.c: Updated testcase.
* testsuite/systemtap.syscall/domainname.c: New testcase.
* testsuite/systemtap.syscall/tee.c: New testcase.