selftests/ptrace: add a test case for PTRACE_SET_SYSCALL_INFO

Check whether PTRACE_SET_SYSCALL_INFO semantics implemented in the kernel
matches userspace expectations.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Dmitry V. Levin <[email protected]>
Reviewed-by: Oleg Nesterov <[email protected]>
Cc: Alexander Gordeev <[email protected]>
Cc: Alexey Gladkov (Intel) <[email protected]>
Cc: Andreas Larsson <[email protected]>
Cc: anton ivanov <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Borislav Betkov <[email protected]>
Cc: Brian Cain <[email protected]>
Cc: Charlie Jenkins <[email protected]>
Cc: Christian Borntraeger <[email protected]>
Cc: Christian Zankel <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Davide Berardi <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: Dinh Nguyen <[email protected]>
Cc: Eugene Syromiatnikov <[email protected]>
Cc: Eugene Syromyatnikov <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Guo Ren <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Helge Deller <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Huacai Chen <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Johannes Berg <[email protected]>
Cc: John Paul Adrian Glaubitz <[email protected]>
Cc: Jonas Bonn <[email protected]>
Cc: Maciej W. Rozycki <[email protected]>
Cc: Madhavan Srinivasan <[email protected]>
Cc: Max Filippov <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Mike Frysinger <[email protected]>
Cc: Naveen N Rao <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Renzo Davoi <[email protected]>
Cc: Richard Weinberger <[email protected]>
Cc: Rich Felker <[email protected]>
Cc: Russel King <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: Stafford Horne <[email protected]>
Cc: Stefan Kristiansson <[email protected]>
Cc: Sven Schnelle <[email protected]>
Cc: Thomas Gleinxer <[email protected]>
Cc: Vasily Gorbik <[email protected]>
Cc: Vineet Gupta <[email protected]>
Cc: WANG Xuerui <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

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