Security update for php53 (important)

This update for php53 fixes the following issues:

• CVE-2015-8838: mysqlnd was vulnerable to BACKRONYM (bnc#973792).
• CVE-2015-8835: SoapClient s_call method suffered from a type confusion
  issue that could have lead to crashes [bsc#973351]
• CVE-2016-2554: A NULL pointer dereference in phar_get_fp_offset could
  lead to crashes. [bsc#968284] Note: we do not ship the phar extension
  currently, so we are not affected.
• CVE-2015-7803: A Stack overflow vulnerability when decompressing tar
  phar archives could potentially lead to code execution. [bsc#949961]
  Note: we do not ship the phar extension currently, so we are not
  affected.
• CVE-2016-3141: A use-after-free / double-free in the WDDX
  deserialization could lead to crashes or potential code execution.
  [bsc#969821]
• CVE-2016-3142: An Out-of-bounds read in phar_parse_zipfile() could lead
  to crashes. [bsc#971912] Note: we do not ship the phar extension
  currently, so we are not affected.
• CVE-2014-9767: A directory traversal when extracting zip files was fixed
  that could lead to
  overwritten files. [bsc#971612]
• CVE-2016-3185: A type confusion vulnerability in
  make_http_soap_request() could lead to crashes or potentially code
  execution. [bsc#971611]