xfree86: os-support: fix missing include of <errno.h>

It's much cleaner to always include directly what one needs,
instead of relying on very indirect including.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1435>
(cherry picked from commit 9fc6e0d304)

hw/xfree86/os-support/bsd/alpha_video.c

@@ -27,7 +27,9 @@
 #include <xorg-config.h>
 #endif
 
+#include <errno.h>
 #include <X11/X.h>
+
 #include "xf86.h"
 #include "xf86Priv.h"
 

hw/xfree86/os-support/bsd/arm_video.c

@@ -60,7 +60,9 @@
 #include <xorg-config.h>
 #endif
 
+#include <errno.h>
 #include <X11/X.h>
+
 #include "xf86.h"
 #include "xf86Priv.h"
 #include "xf86_OSlib.h"

hw/xfree86/os-support/hurd/hurd_video.c

@@ -29,8 +29,9 @@
 #include <device/device.h>
 #include <mach/machine/mach_i386.h>
 #include <hurd.h>
-
+#include <errno.h>
 #include <X11/X.h>
+
 #include "input.h"
 #include "scrnintstr.h"
 

hw/xfree86/os-support/linux/lnx_agp.c

@@ -11,7 +11,9 @@
 #include <xorg-config.h>
 #endif
 
+#include <errno.h>
 #include <X11/X.h>
+
 #include "xf86.h"
 #include "xf86Priv.h"
 #include "xf86_OSlib.h"

hw/xfree86/os-support/linux/lnx_init.c

@@ -27,6 +27,7 @@
 #include <xorg-config.h>
 #endif
 
+#include <errno.h>
 #include <X11/X.h>
 #include <X11/Xmd.h>
 

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

@@ -56,7 +56,9 @@
 #include <xorg-config.h>
 #endif
 
+#include <errno.h>
 #include <X11/X.h>
+
 #include <xserver_poll.h>
 #include "xf86.h"
 #include "xf86Priv.h"

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

@@ -56,7 +56,9 @@
 #include <xorg-config.h>
 #endif
 
+#include <errno.h>
 #include <X11/X.h>
+
 #include <xserver_poll.h>
 #include "xf86.h"
 #include "xf86Priv.h"

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

@@ -32,7 +32,9 @@
 #include <xorg-config.h>
 #endif
 
+#include <errno.h>
 #include <X11/X.h>
+
 #include "xf86.h"
 #include "xf86Priv.h"
 #include "xf86_OSlib.h"

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

@@ -53,7 +53,9 @@
 #include <xorg-config.h>
 #endif
 
+#include <errno.h>
 #include <X11/X.h>
+
 #include "os.h"
 #include "xf86.h"
 #include "xf86Priv.h"

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

@@ -24,6 +24,7 @@
 #include <xorg-config.h>
 #endif
 
+#include <errno.h>
 #include <sys/audio.h>
 #include <sys/uio.h>
 #include <limits.h>

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

@@ -26,6 +26,8 @@
 #include <xorg-config.h>
 #endif
 
+#include <errno.h>
+
 #include "xf86.h"
 #include "xf86Priv.h"
 #include "xf86_OSlib.h"