patch 8.1.2102: can't build with GTK and FEAT_GUI_GNOME

Problem:    Can't build with GTK and FEAT_GUI_GNOME. (Tony Mechelynck)
Solution:   Adjust the #ifdef. (Yegappan Lakshmanan)

Author: brammool

src/session.c

@@ -985,7 +985,7 @@ ex_loadview(exarg_T *eap)
     }
 }
 
-# if defined(USE_GNOME_SESSION) \
+# if defined(FEAT_GUI_GNOME) \
 	|| (defined(GUI_MAY_SPAWN) && defined(EXPERIMENTAL_GUI_CMD)) \
 	|| defined(PROTO)
 /*

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2102,
 /**/
     2101,
 /**/