single-step breakpoint fails; make this a KFAIL on sparc*-*-openbsd*. * gdb.base/siginfo.exp: Likewise. * gdb.base/sigstep.exp (advance, advancei): Likewise.
* gdb.base/siginfo.exp: Clean up step out of signal. * gdb.base/sigstep.exp: Ditto.
* gdb.base/siginfo.c: New file. * gdb.base/siginfo.exp: New file.