tools headers uapi: Update fs.h with the kernel sources

To pick up changes from:

  db2ab24 ("Add RWF_NOSIGNAL flag for pwritev2")

These are used to beautify fs syscall arguments, albeit the changes in
this update are not affecting those beautifiers.

This addresses these tools/ build warnings:

  Warning: Kernel ABI header differences:
  diff -u tools/perf/trace/beauty/include/uapi/linux/fs.h include/uapi/linux/fs.h

Please see tools/include/uapi/README for details (it's in the first patch
of this series).

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Ian Rogers <irogers@google.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Lauri Vasama <git@vasama.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Author: acmel

tools/perf/trace/beauty/include/uapi/linux/fs.h

@@ -430,10 +430,13 @@ typedef int __bitwise __kernel_rwf_t;
 /* buffered IO that drops the cache after reading or writing data */
 #define RWF_DONTCACHE	((__force __kernel_rwf_t)0x00000080)
 
+/* prevent pipe and socket writes from raising SIGPIPE */
+#define RWF_NOSIGNAL	((__force __kernel_rwf_t)0x00000100)
+
 /* mask of flags supported by the kernel */
 #define RWF_SUPPORTED	(RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT |\
 			 RWF_APPEND | RWF_NOAPPEND | RWF_ATOMIC |\
-			 RWF_DONTCACHE)
+			 RWF_DONTCACHE | RWF_NOSIGNAL)
 
 #define PROCFS_IOCTL_MAGIC 'f'