Include headers to compile on musl

bin/varnishtest/vtc_barrier.c

@@ -35,6 +35,7 @@
 #include <unistd.h>
 
 #include <sys/socket.h>
+#include <sys/time.h> /* for MUSL */
 
 #include "vtc.h"
 #include "vtcp.h"

lib/libvarnishapi/vut.c

@@ -40,6 +40,7 @@
 #include <errno.h>
 #include <string.h>
 #include <signal.h>
+#include <sys/stat.h> /* for MUSL */
 
 #include "compat/daemon.h"
 #include "vdef.h"

lib/libvarnishapi/vxp.c

@@ -33,6 +33,7 @@
 #include <ctype.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h> /* for MUSL */
 
 #include "vdef.h"
 #include "vas.h"

lib/libvarnishapi/vxp_lexer.c

@@ -33,6 +33,7 @@
 #include <ctype.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h> /* for MUSL */
 
 #include "vdef.h"
 #include "vas.h"