Log Message:
Update php71 to 7.1.0RC3

Changes:
- Core:
  . Fixed bug #73156 (segfault on undefined function). (Dmitry)
  . Fixed bug #73163 (PHP hangs if error handler throws while accessing undef
    const in default value). (Nikita)
  . Fixed bug #73172 (parse error: Invalid numeric literal). (Nikita, Anatol)
  . Fixed bug #73181 (parse_str() without a second argument leads to crash).
    (Nikita)

- COM:
  . Fixed bug #73126 (Cannot pass parameter 1 by reference). (Anatol)
  . Fixed bug #69579 (Invalid free in extension trait). (John Boehr)

- GD:
  . Fixed bug #50194 (imagettftext broken on transparent background w/o
    alphablending). (cmb)
  . Fixed bug #73003 (Integer Overflow in gdImageWebpCtx of gd_webp.c). (trylab,
    cmb)
  . Fixed bug #53504 (imagettfbbox gives incorrect values for bounding box).
    (Mark Plomer, cmb)
  . Fixed bug #73157 (imagegd2() ignores 3rd param if 4 are given). (cmb)
  . Fixed bug #73155 (imagegd2() writes wrong chunk sizes on boundaries). (cmb)
  . Fixed bug #73159 (imagegd2(): unrecognized formats may result in corrupted
    files). (cmb)
  . Fixed bug #73161 (imagecreatefromgd2() may leak memory). (cmb)

- JSON:
  . Fixed bug #73113 (Segfault with throwing JsonSerializable). (julien)

- PCRE:
  . Fixed bug #73121 (Bundled PCRE doesn't compile because JIT isn't supported
    on s390). (Anatol)

- PDO_DBlib:
  . Fixed bug #72414 (Never quote values as raw binary data). (Adam Baratz)
  . Allow \PDO::setAttribute() to set query timeouts. (Adam Baratz)
  . Handle SQLDECIMAL/SQLNUMERIC types, which are used by later TDS versions.
    (Adam Baratz)
  . Add common PDO test suite. (Adam Baratz)
  . Free error and message strings when cleaning up PDO instances.
    (Adam Baratz)
  . Fixed bug #67130 (\PDOStatement::nextRowset() should succeed when all rows
    in current rowset haven't been fetched). (Peter LeBrun)
  . Ignore potentially misleading dberr values. (Chris Kings-Lynne)

- phpdbg:
  . Added generator command for inspection of currently alive generators. (Bob)

- Reflection
  . Undo backwards compatiblity break in ReflectionType->__toString() and
    deprecate via documentation instead. (Nikita)

- Session:
  . Fixed bug #73100 (session_destroy null dereference in ps_files_path_create).
    (cmb)