libvirt security and bug fix update

[0.8.2-29.0.1.el5]

• Replaced docs/et.png in tarball
• remove virshtest from test cases to fix failure in mock build root

[libvirt-0.8.2-29.el5]

• Coverity pointed out an use after free in the fix for 816601 (rhbz#772848)

[libvirt-0.8.2-28.el5]

• qemu: Rollback on used USB devices (rhbz#816601)
• qemu: Don’t delete USB device on failed qemuPrepareHostdevUSBDevices (rhbz#816601)

[libvirt-0.8.2-27.el5]

• qemu: Delete USB devices used by domain on stop (rhbz#816601)

[libvirt-0.8.2-26.el5]

• Fix off-by-1 in virFileAbsPath. (rhbz#680289)
• Fix autostart flag when loading running domains (rhbz#675319)
• node_device: Avoid null dereference on error (rhbz#772848)
• util: Avoid null deref on qcowXGetBackingStore (rhbz#772848)
• docs: Improve virsh domxml-*-native command docs (rhbz#783001)
• Clarify the purpose of domxml-from-native (rhbz#783001)
• qemu: Add return value check (rhbz#772821)
• storage: Avoid mishandling backing store > 2GB (rhbz#772821)
• util: Avoid PATH_MAX-sized array (rhbz#816601)
• qemu: Keep list of USB devices attached to domains (rhbz#816601)
• qemu: Don’t leak temporary list of USB devices (rhbz#816601)
• usb: Create functions to search usb device accurately (rhbz#816601)
• qemu: Call usb search function for hostdev initialization and hotplug (rhbz#816601)
• usb: Fix crash when failing to attach a second usb device (rhbz#816601)