tools include uapi asm-generic: Grab a copy of fcntl.h

tools include uapi asm-generic: Grab a copy of fcntl.h

We'll need defines for beautifying fcntl arguments that are not
available in older distros, these:

  trace/beauty/fcntl.c: In function 'syscall_arg__scnprintf_fcntl_arg':
  trace/beauty/fcntl.c:93: error: 'F_OFD_SETLK' undeclared (first use in this function)
  trace/beauty/fcntl.c:93: error: (Each undeclared identifier is reported only once
  trace/beauty/fcntl.c:93: error: for each function it appears in.)
  trace/beauty/fcntl.c:93: error: 'F_OFD_SETLKW' undeclared (first use in this function)
  trace/beauty/fcntl.c:93: error: 'F_OFD_GETLK' undeclared (first use in this function)
  trace/beauty/fcntl.c:94: error: 'F_GETOWN_EX' undeclared (first use in this function)
  trace/beauty/fcntl.c:94: error: 'F_SETOWN_EX' undeclared (first use in this function)

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-gvlw67a47e9z65jdunj4je5s@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>