Implement -e trace=%fstatfs option

Implement -e trace=%fstatfs option

linux/*/syscallent*.h part is updated automatically by:

    sed -i 's/TD,[[:space:]]\([[:space:]]*SEN.*[_"]fstatv\?fs\)/TD|TFSF,\1/' \
           linux/*/syscallent*.h

* sysent.h (TRACE_FSTATFS): New macro.
* syscall.c: Alias TFSF to TRACE_FSTATFS around syscallent.h inclusion.
* qualify.c (lookup_class): Add SCHED_FSTATFS for "%fstatfs".
* strace.1 (.SS Filtering): Add information about %fstatfs syscall class.
* NEWS: Mention this change.
* linux/32/syscallent.h (fstatfs64): Add TFSF flag.
* linux/64/syscallent.h (fstatfs): Likewise.
* linux/aarch64/syscallent.h: Likewise.
* linux/mips/syscallent-n64.h: Likewise.
* linux/x32/syscallent.h: Likewise.
* linux/x86_64/syscallent.h: Likewise.
* linux/arm/syscallent.h (fstatfs, fstatfs64):
Likewise.
* linux/avr32/syscallent.h: Likewise.
* linux/bfin/syscallent.h: Likewise.
* linux/crisv10/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-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/xtensa/syscallent.h: Likewise.
* linux/alpha/syscallent.h (ofs_fstatfs, osf_fstatfs64): Likewise.
* linux/mips/syscallent-compat.h (*_fstatfs, *_fstatvfs): Likewise.
* tests/gen_tests.in (trace_fstatfs): New entry.
* tests/trace_fstatfs.in: New file.
* tests/Makefile.am (EXTRA_DIST): Add it.
* tests/ksysent.c (TFSF): New macro, defined to 0.
* tests/nsyscalls.c: Likewise.