alpine: use sys/wait.h instead of wait.h

In file included from socket_listen.c:22:0:
/usr/include/wait.h:1:2: error: #warning redirecting incorrect #include <wait.h> to <sys/wait.h> [-Werror=cpp]
 #warning redirecting incorrect #include <wait.h> to <sys/wait.h>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

test/zdtm/static/socket6_udp.c

@@ -13,7 +13,7 @@ const char *test_author = "Cyrill Gorcunov <gorcunov@openvz.org>\n";
 #include <stdlib.h>
 #include <sys/socket.h>
 #include <arpa/inet.h>  /* for sockaddr_in and inet_ntoa() */
-#include <wait.h>
+#include <sys/wait.h>
 
 static int port = 8880;
 static char buf[64];

test/zdtm/static/socket_aio.c

@@ -16,7 +16,7 @@ const char *test_author = "Andrew Vagin <avagin@parallels.com>";
 #include <errno.h>
 #include <stdlib.h>
 #include <aio.h>
-#include <wait.h>
+#include <sys/wait.h>
 #include <netinet/tcp.h>
 
 static int port = 8880;

test/zdtm/static/socket_listen.c

@@ -19,7 +19,7 @@ const char *test_author = "Stanislav Kinsbursky <skinsbursky@openvz.org>";
 #include <unistd.h>
 #include <errno.h>
 #include <stdlib.h>
-#include <wait.h>
+#include <sys/wait.h>
 #include <netinet/tcp.h>
 
 static int port = 8880;

test/zdtm/static/socket_udp.c

@@ -18,7 +18,7 @@ const char *test_author = "Pavel Emelyanov <xemul@parallels.com<>\n";
 #include <stdlib.h>
 #include <sys/socket.h>
 #include <arpa/inet.h>  /* for sockaddr_in and inet_ntoa() */
-#include <wait.h>
+#include <sys/wait.h>
 
 static int port = 8880;
 static char buf[8];

test/zdtm/static/socket_udp_shutdown.c

@@ -8,7 +8,7 @@
 #include <stdlib.h>
 #include <sys/socket.h>
 #include <arpa/inet.h>  /* for sockaddr_in and inet_ntoa() */
-#include <wait.h>
+#include <sys/wait.h>
 
 #include "zdtmtst.h"
 

test/zdtm/static/socket_udplite.c

@@ -18,7 +18,7 @@ const char *test_author = "Pavel Emelyanov <xemul@parallels.com<>\n";
 #include <stdlib.h>
 #include <sys/socket.h>
 #include <arpa/inet.h>  /* for sockaddr_in and inet_ntoa() */
-#include <wait.h>
+#include <sys/wait.h>
 
 static int port = 8890;
 static char buf[8];