Add seccomp filter syscall flag

Add seccomp filter syscall flag

This commit adds a new syscall flag for syscall that are traced by default
under seccomp filter.

The syscallent changes can be reproduced with the following script:

  git grep -l 'SEN(\(execv\|ipc\|socketcall\|ipc\)' |
  xargs -r sed -i -e '/SEN(execv/ s/TP|/&TSD|/' \
  -e '/SEN(ipc)/ s/TI/&|TSD/' -e '/SEN(socketcall)/ s/TD/&|TSD/' \
  -e '/SEN(syscall)/ s/0,/TSD,/'

* sysent.h (TRACE_SECCOMP_DEFAULT): Define new flag.
* sysent_shorthand_defs.h (TSD): Define new flag shorthand.
* linux/32/syscallent.h: Add TSD flag.
* linux/64/syscallent.h: Likewise.
* linux/alpha/syscallent.h: Likewise.
* linux/arm/syscallent.h: Likewise.
* linux/avr32/syscallent.h: Likewise.
* linux/bfin/syscallent.h: Likewise.
* linux/hppa/syscallent.h: Likewise.
* linux/i386/syscallent.h: Likewise.
* linux/ia64/syscallent.h: Likewise.
* linux/m68k/syscallent.h: Likewise.
* linux/microblaze/syscallent.h: Likewise.
* linux/mips/syscallent-n32.h: Likewise.
* linux/mips/syscallent-n64.h: Likewise.
* linux/mips/syscallent-o32.h: Likewise.
* linux/powerpc/syscallent.h: Likewise.
* linux/powerpc64/syscallent.h: Likewise.
* linux/s390/syscallent.h: Likewise.
* linux/s390x/syscallent.h: Likewise.
* linux/sh/syscallent.h: Likewise.
* linux/sh64/syscallent.h: Likewise.
* linux/sparc/syscallent.h: Likewise.
* linux/sparc64/syscallent.h: Likewise.
* linux/x32/syscallent.h: Likewise.
* linux/x86_64/syscallent.h: Likewise.
* linux/xtensa/syscallent.h: Likewise.

Signed-off-by: Paul Chaignon <paul.chaignon@gmail.com>