Include src/tools in paths to check with "make check-spaces"

Makefile.am

@@ -68,7 +68,7 @@ check-spaces:
 	        src/common/*.h                        \
 		src/common/[^asO]*.c src/common/address.c \
 		src/or/[^et]*.[ch] src/or/t*.c src/or/eventdns_tor.h \
-		src/test/test*.[ch]
+		src/test/test*.[ch] src/tools/*.[ch]
 
 check-docs:
 	./contrib/checkOptionDocs.pl