opera: multiple vulnerabilities

Opera 12.10 fixes the following security issues:

• -an issue that could cause Opera not to correctly check for certificate revocation;
• -an issue where CORS requests could incorrectly retrieve contents of cross origin pages;
• -an issue where data URIs could be used to facilitate Cross-Site Scripting;
• -a high severity issue, as reported by Gareth Heyes; details will be disclosed at a later date
• -an issue where specially crafted SVG images could allow execution of arbitrary code;
• -a moderate severity issue, as reported by the Google Security Group; details will be disclosed at a later date