Add feature macros to more C files

These source files use "struct timespec", which is POSIX 1993.09.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>

backend/wayland/output.c

@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 199309L
 #include <assert.h>
 #include <stdint.h>
 #include <stdio.h>

types/data_device/wlr_data_device.c

@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 199309L
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>

types/data_device/wlr_drag.c

@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 199309L
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>

types/wlr_export_dmabuf_v1.c

@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 199309L
 #include <assert.h>
 #include <stdlib.h>
 #include <unistd.h>

types/wlr_idle.c

@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 199309L
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>

types/wlr_keyboard_shortcuts_inhibit_v1.c

@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 199309L
 #include <assert.h>
 #include <stdlib.h>
 #include <util/signal.h>

types/wlr_pointer_constraints_v1.c

@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 199309L
 #include <assert.h>
 #include <limits.h>
 #include <pixman.h>

types/wlr_primary_selection.c

@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 199309L
 #include <assert.h>
 #include <stdlib.h>
 #include <wlr/types/wlr_primary_selection.h>

types/wlr_relative_pointer_v1.c

@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 199309L
 #include <assert.h>
 #include <inttypes.h>
 #include <stdlib.h>

types/wlr_screencopy_v1.c

@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 199309L
 #include <assert.h>
 #include <stdlib.h>
 #include <drm_fourcc.h>

types/wlr_virtual_pointer_v1.c

@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 199309L
 #include <assert.h>
 #include <stdlib.h>
 #include <wlr/types/wlr_seat.h>

types/wlr_xdg_decoration_v1.c

@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 199309L
 #include <assert.h>
 #include <stdbool.h>
 #include <stdlib.h>

types/xdg_shell/wlr_xdg_popup.c

@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 199309L
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>

types/xdg_shell/wlr_xdg_positioner.c

@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 199309L
 #include <assert.h>
 #include <stdlib.h>
 #include "types/wlr_xdg_shell.h"

types/xdg_shell/wlr_xdg_shell.c

@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 199309L
 #include <assert.h>
 #include <stdlib.h>
 #include "types/wlr_xdg_shell.h"

types/xdg_shell/wlr_xdg_surface.c

@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 199309L
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>