drmtools: add missing <endian.h> include

`__BYTE_ORDER` `__LITTLE_ENDIAN`, and `__BIG_ENDIAN` are not defined
otherwise, and the first check ends up being accepted because both
undefined tokens get resolved to 0.

Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>
Message-Id: <20180227153528.29635-1-eric.engestrom@imgtec.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drmtools.c b/drmtools.c
index c71ddae..3bd207e 100644
--- a/drmtools.c
+++ b/drmtools.c
@@ -6,6 +6,7 @@
 #include <errno.h>
 #include <string.h>
 #include <inttypes.h>
+#include <endian.h>
 
 #include <sys/ioctl.h>
 #include <libdrm/drm_fourcc.h>