Use the correct type for TableInfo->relreplident.

Mistakenly relreplident was stored as a bool. That works today as c.h
typedefs bool to a char, but isn't very future proof.

Discussion: 20150812084351.GD8470@awork2.anarazel.de
Backpatch: 9.4 where replica identity was introduced.

src/bin/pg_dump/pg_dump.h

@@ -202,7 +202,7 @@ typedef struct _tableInfo
 	char		relkind;
 	char		relpersistence; /* relation persistence */
 	bool		relispopulated; /* relation is populated */
-	bool		relreplident;	/* replica identifier */
+	char		relreplident;	/* replica identifier */
 	char	   *reltablespace;	/* relation tablespace */
 	char	   *reloptions;		/* options specified by WITH (...) */
 	char	   *checkoption;	/* WITH CHECK OPTION */