Sockets disable zerocopy test on ppc based arch.

Failure reported by alpine maintainers.
Closes php#9081.

Author: devnexen

ext/sockets/tests/socket_sendto_zerocopy.phpt

@@ -4,9 +4,13 @@ Test socket_sendto with MSG_ZEROCOPY
 sockets
 --SKIPIF--
 <?php
+$arch = php_uname('m');
 if (!defined("SO_ZEROCOPY")) {
     die('skip SO_ZEROCOPY');
 }
+if (strpos($arch, 'ppc') !== false || strpos($arch, 'powerpc') !== false) {
+    die('skip not for powerpc arch');
+}
 --FILE--
 <?php
 $socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);