squid needs libtool

package/squid/Makefile

@@ -10,7 +10,7 @@ PKG_MD5SUM:=		c70ef1198e6a6c1ae80bc57cd3592e36
 PKG_DESCR:=		squid web and cache proxy
 PKG_SECTION:=		proxy
 PKG_DEPENDS:=		libopenssl libpthread
-PKG_BUILDDEP:=		openssl
+PKG_BUILDDEP:=		openssl libtool
 PKG_URL:=		http://www.squid-cache.org/
 PKG_SITES:=		http://www.squid-cache.org/Versions/v3/3.1/
 PKG_MULTI:=		1