Updated clamav packages fix security vulnerabilities

ClamAV 0.98.6 is a maintenance release to fix some bugs, some of them being security bugs: Fix a heap out of bounds condition with crafted Yoda’s crypter files. This issue was discovered by Felix Groebert of the Google Security Team. Fix a heap out of bounds condition with crafted mew packer files. This issue was discovered by Felix Groebert of the Google Security Team. Fix a heap out of bounds condition with crafted upx packer files. This issue was discovered by Kevin Szkudlapski of Quarkslab. Fix a heap out of bounds condition with crafted upack packer files. This issue was discovered by Sebastian Andrzej Siewior (CVE-2014-9328). Compensate a crash due to incorrect compiler optimization when handling crafted petite packer files. This issue was discovered by Sebastian Andrzej Siewior.