extra/tools: autmake bump to 1.15.1

1.15 doesn't build at all!

Change-Id: I40b2cdaf5a99adf6556749de7348b090a68a549a

extras/tools/packages.mak

@@ -15,7 +15,7 @@ LIBTOOL_URL=$(GNU)/libtool/libtool-$(LIBTOOL_VERSION).tar.xz
 AUTOCONF_VERSION=2.69
 AUTOCONF_URL=$(GNU)/autoconf/autoconf-$(AUTOCONF_VERSION).tar.gz
 
-AUTOMAKE_VERSION=1.15
+AUTOMAKE_VERSION=1.15.1
 AUTOMAKE_URL=$(GNU)/automake/automake-$(AUTOMAKE_VERSION).tar.gz
 
 M4_VERSION=1.4.17