Security update for php7 (important)

This update for php7 fixes the following security issues:

• CVE-2016-6128: Invalid color index not properly handled [bsc#987580]
• CVE-2016-6161: global out of bounds read when encoding gif from
  malformed input withgd2togif [bsc#988032]
• CVE-2016-6292: Null pointer dereference in exif_process_user_comment
  [bsc#991422]
• CVE-2016-6295: Use after free in SNMP with GC and unserialize()
  [bsc#991424]
• CVE-2016-6297: Stack-based buffer overflow vulnerability in
  php_stream_zip_opener [bsc#991426]
• CVE-2016-6291: Out-of-bounds access in exif_process_IFD_in_MAKERNOTE
  [bsc#991427]
• CVE-2016-6289: Integer overflow leads to buffer overflow in
  virtual_file_ex [bsc#991428]
• CVE-2016-6290: Use after free in unserialize() with Unexpected Session
  Deserialization [bsc#991429]
• CVE-2016-5399: Improper error handling in bzread() [bsc#991430]
• CVE-2016-6296: Heap buffer overflow vulnerability in simplestring_addn
  in simplestring.c [bsc#991437]
• CVE-2016-6207: Integer overflow error within _gdContributionsAlloc()
  [bsc#991434]
• CVE-2016-4473: Invalid free() instead of efree() in phar_extract_file()
• CVE-2016-7124: Create an Unexpected Object and Don’t Invoke __wakeup()
  in Deserialization
• CVE-2016-7125: PHP Session Data Injection Vulnerability
• CVE-2016-7126: select_colors write out-of-bounds
• CVE-2016-7127: imagegammacorrect allowed arbitrary write access
• CVE-2016-7128: Memory Leakage In exif_process_IFD_in_TIFF
• CVE-2016-7129: wddx_deserialize allowed illegal memory access
• CVE-2016-7131: wddx_deserialize null dereference with invalid xml
• CVE-2016-7132: wddx_deserialize null dereference in php_wddx_pop_element
• CVE-2016-7133: memory allocator fails to realloc small block to large one
• CVE-2016-7134: Heap overflow in the function curl_escape
• CVE-2016-7130: wddx_deserialize null dereference
• CVE-2016-7413: Use after free in wddx_deserialize
• CVE-2016-7412: Heap overflow in mysqlnd when not receiving UNSIGNED_FLAG
  in BIT field
• CVE-2016-7417: Missing type check when unserializing SplArray
• CVE-2016-7416: Stack based buffer overflow in msgfmt_format_message
• CVE-2016-7418: Null pointer dereference in php_wddx_push_element
• CVE-2016-7414: Out of bounds heap read when verifying signature of zip
  phar in phar_parse_zipfile