enum-types: Explicitly set the enum nick in some cases

glib-mkenums fails to generate proper nicks and strips away th non- and
no-. Fix those cases manually.

Also fix the header guard while at it.

Technically this is an API break, but the API does exactly the opposite
of what it promises, so if anyone depended on this, we probably would
have received a bug report. Let's take the risk and just change it.

common/flatpak-enum-types.h.template

@@ -20,5 +20,5 @@ FLATPAK_EXTERN GType @enum_name@_get_type (void);
 /*** BEGIN file-tail ***/
 G_END_DECLS
 
-#endif /* __GIO_ENUM_TYPES_H__ */
+#endif /* __FLATPAK_ENUM_TYPES_H__ */
 /*** END file-tail ***/

common/flatpak-transaction.h

@@ -59,7 +59,7 @@ typedef enum {
  * The details for #FlatpakTransaction::operation-error.
  */
 typedef enum {
-  FLATPAK_TRANSACTION_ERROR_DETAILS_NON_FATAL = 1 << 0,
+  FLATPAK_TRANSACTION_ERROR_DETAILS_NON_FATAL = 1 << 0, /*< nick=non-fatal >*/
 } FlatpakTransactionErrorDetails;
 
 /**
@@ -69,7 +69,7 @@ typedef enum {
  * The details for #FlatpakTransaction::operation-done.
  */
 typedef enum {
-  FLATPAK_TRANSACTION_RESULT_NO_CHANGE = 1 << 0,
+  FLATPAK_TRANSACTION_RESULT_NO_CHANGE = 1 << 0, /*< nick=no-change >*/
 } FlatpakTransactionResult;
 
 /**