tools headers UAPI: sync linux/socket.h with kernel

JIRA: https://issues.redhat.com/browse/RHEL-29796
Upstream Status: RHEL only

description
===========
Upstream, when there is a change in a header file from the specific set
of headers (listed in tools/perf/check-headers.sh), it is accompanied by
a commit that brings the same change into its counterpart located in
tools/include. Usually several changes are squashed together. We cannot
easily follow this strategy, since we not always take all the commits
squashed together.

In order to tidy tools/include up, we need to sync the headers manually.

Signed-off-by: Michael Petlan <mpetlan@redhat.com>

Author: rfmvh

tools/perf/trace/beauty/include/linux/socket.h

@@ -320,6 +320,7 @@ struct ucred {
 					  */
 
 #define MSG_ZEROCOPY	0x4000000	/* Use user data in kernel path */
+#define MSG_SPLICE_PAGES 0x8000000	/* Splice the pages from the iterator in sendmsg() */
 #define MSG_FASTOPEN	0x20000000	/* Send data in TCP SYN */
 #define MSG_CMSG_CLOEXEC 0x40000000	/* Set close_on_exec for file
 					   descriptor received through
@@ -330,6 +331,8 @@ struct ucred {
 #define MSG_CMSG_COMPAT	0		/* We never have 32 bit fixups */
 #endif
 
+/* Flags to be cleared on entry by sendmsg and sendmmsg syscalls */
+#define MSG_INTERNAL_SENDMSG_FLAGS (MSG_SPLICE_PAGES)
 
 /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
 #define SOL_IP		0