Make builtin binding fast again by binding only referenced symbols

Avoid doing the internal binding of top-level symbols in the parser,
leaving that work to be done in a post-processing step. For builtins,
this lets us do a reference-aware bind step (block_bind_incremental)
*after* generating builtins/0.

Libraries are a bit trickier since they may be bound multiple times, so
instead of thinking through the implications I added (block_bind_self)
to resolve all internal symbols immediately.

src/linker.c

@@ -336,6 +336,7 @@ static int load_library(jq_state *jq, jv lib_path, int is_data, int raw, const c
                                       jv_string(dirname(lib_origin)),
                                       &program, lib_state);
       free(lib_origin);
+      program = block_bind_self(program, OP_IS_CALL_PSEUDO);
     }
   }
   state_idx = lib_state->ct++;