tests: fix implicit funciton declaration errors

ioctl() and strcmp() were used without the relevent header being
included.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Jan Vesely <jan.vesely@rutgers.edu>

tests/auth.c

@@ -26,6 +26,7 @@
  */
 
 #include <limits.h>
+#include <sys/ioctl.h>
 #include "drmtest.h"
 
 enum auth_event {

tests/getclient.c

@@ -26,6 +26,7 @@
  */
 
 #include <limits.h>
+#include <sys/ioctl.h>
 #include "drmtest.h"
 
 /**

tests/getstats.c

@@ -26,6 +26,7 @@
  */
 
 #include <limits.h>
+#include <sys/ioctl.h>
 #include "drmtest.h"
 
 /**

tests/lock.c

@@ -30,6 +30,7 @@
  */
 
 #include <limits.h>
+#include <sys/ioctl.h>
 #include "drmtest.h"
 
 enum auth_event {

tests/name_from_fd.c

@@ -28,6 +28,7 @@
 #include <unistd.h>
 #include <fcntl.h>
 #include <limits.h>
+#include <string.h>
 #include "drmtest.h"
 
 /**

tests/setversion.c

@@ -27,6 +27,7 @@
 
 #include <limits.h>
 #include <string.h>
+#include <sys/ioctl.h>
 #include "drmtest.h"
 
 /**

tests/updatedraw.c

@@ -25,6 +25,7 @@
  *
  */
 
+#include <sys/ioctl.h>
 #include "drmtest.h"
 
 static void