tools/gl: fix codespell issues

gl/mountlist.h

@@ -30,7 +30,7 @@ struct mount_entry
   char *me_type;                /* "nfs", "4.2", etc. */
   dev_t me_dev;                 /* Device number of me_mountdir. */
   unsigned int me_dummy : 1;    /* Nonzero for dummy file systems. */
-  unsigned int me_remote : 1;   /* Nonzero for remote fileystems. */
+  unsigned int me_remote : 1;   /* Nonzero for remote filesystems. */
   unsigned int me_type_malloced : 1; /* Nonzero if me_type was malloced. */
   struct mount_entry *me_next;
 };

gl/regexec.c

@@ -2269,7 +2269,7 @@ sift_states_iter_mb (const re_match_context_t *mctx, re_sift_context_t *sctx,
 			    dfa->nexts[node_idx]))
     /* The node can't accept the "multi byte", or the
        destination was already thrown away, then the node
-       could't accept the current input "multi byte".   */
+       couldn't accept the current input "multi byte".   */
     naccepted = 0;
   /* Otherwise, it is sure that the node could accept
      'naccepted' bytes input.  */