egl/drivers: include stdint.h where needed

Currently these files are including it indirectly via eglcompiler.h
The latter of which will be removed with follow up commits.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Brian Paul <brianp@vmware.com>

src/egl/drivers/dri2/egl_dri2.c

@@ -27,6 +27,7 @@
 
 #define WL_HIDE_DEPRECATED
 
+#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>

src/egl/drivers/dri2/egl_dri2.h

@@ -28,6 +28,8 @@
 #ifndef EGL_DRI2_INCLUDED
 #define EGL_DRI2_INCLUDED
 
+#include <stdint.h>
+
 #ifdef HAVE_X11_PLATFORM
 #include <xcb/xcb.h>
 #include <xcb/dri2.h>

src/egl/drivers/dri2/platform_drm.c

@@ -25,6 +25,7 @@
  *    Kristian Høgsberg <krh@bitplanet.net>
  */
 
+#include <stdint.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>

src/egl/drivers/dri2/platform_wayland.c

@@ -26,6 +26,7 @@
  *    Benjamin Franzke <benjaminfranzke@googlemail.com>
  */
 
+#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 #include <limits.h>

src/egl/drivers/dri2/platform_x11.c

@@ -26,6 +26,7 @@
  */
 
 #include <stdbool.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>

src/egl/drivers/haiku/egl_haiku.cpp

@@ -24,6 +24,7 @@
 
 #include <errno.h>
 #include <dlfcn.h>
+#include <stdint.h>
 #include <stdio.h>
 
 extern "C" {