libxml2: fixing heap-based buffer overflow (CVE-2011-3919)

A heap-based buffer overflow during decoding of entity
references with overly long names has been fixed.
CVE-2011-3919 has been assigned.

Fixed bugs
bnc#739894
VUL-0: CVE-2011-3919: libxml2: heap-based buffer overflow during decoding of entity references with overly long names
Selected Binaries
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