shared: extract hash table implementation from xwayland

The hash table implementation is useful for other modules as well. Move it from
xwayland to the shared code.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>

shared/meson.build

@@ -5,6 +5,7 @@ srcs_libshared = [
 	'file-util.c',
 	'os-compatibility.c',
         'process-util.c',
+	'hash.c',
 ]
 deps_libshared = [dep_wayland_client, dep_wayland_server, dep_pixman]
 

xwayland/dnd.c

@@ -40,7 +40,7 @@
 #include <libweston/libweston.h>
 #include "xwayland.h"
 
-#include "hash.h"
+#include "shared/hash.h"
 
 struct dnd_data_source {
 	struct weston_data_source base;

xwayland/meson.build

@@ -14,7 +14,6 @@ srcs_xwayland = [
 	'window-manager.c',
 	'selection.c',
 	'dnd.c',
-	'hash.c',
 ]
 
 dep_names_xwayland = [

xwayland/window-manager.c

@@ -46,7 +46,7 @@
 #include "xwayland-internal-interface.h"
 
 #include "shared/cairo-util.h"
-#include "hash.h"
+#include "shared/hash.h"
 #include "shared/helpers.h"
 #include "shared/xcb-xwayland.h"