Update to latest HEAD
    
    - Add support for weak deps. to repoquery.
    - yum-builddep: respect --tolerant to ignore missing dependencies
    - Add plugin for overlayfs issue workaround. Patch by Pavel Odvody. BZ#1213602
    - yum-config-manager: require \* syntax to disable all repos. BZ#1151154
    - yum-config-manager: update config file specified using -c option. BZ#1075708
    - Deal with gpgdir and gpgcadir keys, in keys plugin.