Fix missing include of sys/stat.h

Instead of relying on very indirect includes, it's more more clean when
everybody explicitly includes what he really needs.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1417>

hw/xfree86/common/xf86Config.c

@@ -46,6 +46,7 @@
 #include <xorg-config.h>
 #endif
 
+#include <sys/stat.h>
 #include <sys/types.h>
 #include <grp.h>
 

hw/xfree86/common/xf86Helper.c

@@ -38,7 +38,9 @@
 #include <xorg-config.h>
 #endif
 
+#include <sys/stat.h>
 #include <X11/X.h>
+
 #include "mi.h"
 #include "os.h"
 #include "servermd.h"

hw/xfree86/common/xf86Init.c

@@ -36,6 +36,7 @@
 
 #include <stdlib.h>
 #include <errno.h>
+#include <sys/stat.h>
 
 #undef HAS_UTSNAME
 #if !defined(WIN32)

hw/xfree86/os-support/shared/sigio.c

@@ -57,6 +57,7 @@
 #endif
 
 #include <errno.h>
+#include <sys/stat.h>
 #include <X11/X.h>
 
 #include "os/osdep.h"

hw/xfree86/os-support/solaris/sun_init.c

@@ -27,6 +27,7 @@
 #endif
 
 #include <errno.h>
+#include <sys/stat.h>
 
 #include "../../../../os/cmdline.h"
 

hw/xfree86/os-support/xf86_OSlib.h

@@ -88,7 +88,6 @@
 #include <sys/ioctl.h>
 #include <signal.h>
 #include <termio.h>
-#include <sys/stat.h>
 #include <sys/types.h>
 
 #include <errno.h>
@@ -155,8 +154,6 @@ extern _X_HIDDEN char xf86SolarisFbDev[PATH_MAX];
 
 #include <errno.h>
 
-#include <sys/stat.h>
-
 #include <sys/mman.h>
 #ifdef __linux__
 #define HAS_USL_VTS
@@ -185,7 +182,6 @@ extern _X_HIDDEN char xf86SolarisFbDev[PATH_MAX];
 
 #include <sys/types.h>
 #include <sys/mman.h>
-#include <sys/stat.h>
 
 #endif                          /* CSRG_BASED */
 

hw/xquartz/darwin.c

@@ -32,6 +32,7 @@
 #include <dix-config.h>
 #endif
 
+#include <sys/stat.h>
 #include <X11/X.h>
 #include <X11/Xproto.h>