selftests/bpf: Mute xdpxceiver.c's deprecation warnings

xdpxceiver.c is using AF_XDP APIs that are deprecated starting from
libbpf 0.7. Until we migrate the test to libxdp or solve this issue in
some other way, mute deprecation warnings within xdpxceiver.c.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211201232824.3166325-6-andrii@kernel.org

tools/testing/selftests/bpf/xdpxceiver.c

@@ -100,6 +100,12 @@
 #include "xdpxceiver.h"
 #include "../kselftest.h"
 
+/* AF_XDP APIs were moved into libxdp and marked as deprecated in libbpf.
+ * Until xdpxceiver is either moved or re-writed into libxdp, suppress
+ * deprecation warnings in this file
+ */
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+
 static const char *MAC1 = "\x00\x0A\x56\x9E\xEE\x62";
 static const char *MAC2 = "\x00\x0A\x56\x9E\xEE\x61";
 static const char *IP1 = "192.168.100.162";