Updated thunderbird packages fix security vulnerabilities

Updated thunderbird packages fix security vulnerabilities: Several flaws were found in the processing of malformed web content. A web page containing malicious content could cause Thunderbird to crash or, potentially, execute arbitrary code with the privileges of the user running Thunderbird (CVE-2015-4500, CVE-2015-4509, CVE-2015-4517, CVE-2015-4521, CVE-2015-4522, CVE-2015-7174, CVE-2015-7175, CVE-2015-7176, CVE-2015-7177, CVE-2015-7180). Two information leak flaws were found in the processing of malformed web content. A web page containing malicious content could cause Thunderbird to disclose sensitive information or, in certain cases, crash (CVE-2015-4519, CVE-2015-4520).