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>

1 files changed, 1 insertions, 0 deletions

diff --git a/tests/lock.c b/tests/lock.c
index 86caa281..365681b5 100644
--- a/tests/lock.c
+++ b/tests/lock.c
@@ -30,6 +30,7 @@
  */
 
 #include <limits.h>
+#include <sys/ioctl.h>
 #include "drmtest.h"
 
 enum auth_event {