Updated guile packages fix security vulnerability

The ‘mkdir’ procedure of GNU Guile, an implementation of the Scheme programming language, temporarily changed the process’ umask to zero. During that time window, in a multithreaded application, other threads could end up creating files with insecure permissions (CVE-2016-8605). GNU Guile, an implementation of the Scheme language, provides a “REPL server” which is a command prompt that developers can connect to for live coding and debugging purposes. The REPL server is vulnerable to the HTTP inter-protocol attack. This constitutes a remote code execution vulnerability for developers running a REPL server that listens on a loopback device or private network (CVE-2016-8606). The guile package has been updated to version 2.0.13, fixing these issues and other bugs. See the upstream release announcements for details.