Fix linking for tools, and add tools: target.

tools/Makefile

-tools/ccan_depends: tools/ccan_depends.o tools/depends.o ccan/string/string.o ccan/talloc/talloc.o ccan/noerr/noerr.o
+ALL_TOOLS = tools/ccan_depends tools/run_tests tools/doc_extract tools/namespacize tools/create_dep_tar
 
-tools/run_tests: tools/run_tests.o tools/depends.o ccan/tap/tap.o ccan/string/string.o ccan/noerr/noerr.o ccan/talloc/talloc.o
+.PHONY: tools
+tools: $(ALL_TOOLS)
 
-tools/doc_extract: tools/doc_extract.o ccan/string/string.o ccan/noerr/noerr.o ccan/talloc/talloc.o
+tools/ccan_depends: tools/ccan_depends.o tools/depends.o ccan/str_talloc/str_talloc.o ccan/grab_file/grab_file.o ccan/talloc/talloc.o ccan/noerr/noerr.o
 
-tools/namespacize: tools/namespacize.o tools/depends.o ccan/string/string.o ccan/noerr/noerr.o ccan/talloc/talloc.o
+tools/run_tests: tools/run_tests.o tools/depends.o ccan/str_talloc/str_talloc.o ccan/grab_file/grab_file.o ccan/tap/tap.o ccan/noerr/noerr.o ccan/talloc/talloc.o
 
-tools/create_dep_tar: tools/create_dep_tar.o tools/depends.o ccan/string/string.o ccan/noerr/noerr.o ccan/talloc/talloc.o tools/_infotojson/sqlite3_database.o tools/_infotojson/utils.o
+tools/doc_extract: tools/doc_extract.o ccan/str_talloc/str_talloc.o ccan/grab_file/grab_file.o ccan/noerr/noerr.o ccan/talloc/talloc.o
+
+tools/namespacize: tools/namespacize.o tools/depends.o ccan/str_talloc/str_talloc.o ccan/grab_file/grab_file.o ccan/noerr/noerr.o ccan/talloc/talloc.o
+
+tools/create_dep_tar: tools/create_dep_tar.o tools/depends.o ccan/str_talloc/str_talloc.o ccan/grab_file/grab_file.o ccan/noerr/noerr.o ccan/talloc/talloc.o tools/_infotojson/sqlite3_database.o tools/_infotojson/utils.o
 	$(CC) $(LDFLAGS) -o $@ $^ -lsqlite3
 
 tools/run_tests.o tools/namespacize.o tools/depends.o: tools/tools.h
 
 tools-clean: ccanlint-clean
-	rm -f tools/ccan_depends tools/run_tests tools/doc_extract tools/namespacize
+	rm -f $(ALL_TOOLS)
 
 include tools/ccanlint/Makefile
 include tools/_infotojson/Makefile