ecore-x: re-add implementation of ecore_x_connection_get()

this symbol has been missing since the removal of xcb

@fix

m4/efl_find_x.m4

@@ -120,6 +120,7 @@ AC_DEFUN([EFL_FIND_X],
             efl_x11_lib=
           fi
         done
+        efl_x11_modules="$efl_x11_modules x11-xcb"
 
         PKG_CHECK_EXISTS([$efl_x11_modules],
           [

src/lib/ecore_x/ecore_x.c

@@ -2519,6 +2519,13 @@ ecore_x_default_depth_get(Ecore_X_Display *disp,
    return depth;
 }
 
+EAPI Ecore_X_Connection *
+ecore_x_connection_get(void)
+{
+   EINA_SAFETY_ON_NULL_RETURN_VAL(_ecore_x_disp, NULL);
+   return XGetXCBConnection(_ecore_x_disp);
+}
+
 EAPI void
 ecore_x_xkb_select_group(int group)
 {

src/lib/ecore_x/ecore_x_private.h

@@ -7,6 +7,7 @@
 #endif /* ifndef MAXHOSTNAMELEN */
 
 #include <X11/Xlib.h>
+#include <X11/Xlib-xcb.h>
 #include <X11/Xproto.h>
 #include <X11/Xutil.h>
 #include <X11/Xatom.h>