Fix bug #67327: fileinfo: CDF infinite loop in nelements DoS

Upstream fix: https://github.com/file/file/commit/f97486ef5dc3e8735440edc4fc8808c63e1a3ef0
Fix bug #67328 (fileinfo: numerous file_printf calls resulting in performance degradation)

Upstream patch: https://github.com/file/file/commit/b8acc83781d5a24cc5101e525d15efe0482c280d
Merge branch 'PHP-5.4' into PHP-5.5

* PHP-5.4:
  Fix bug #67328 (fileinfo: numerous file_printf calls resulting in performance degradation)
  Fix bug #67327: fileinfo: CDF infinite loop in nelements DoS
Fixed bug #66307 Fileinfo crashes with powerpoint files
backport this piece from 5.6, related to the #66307 fix
Merge branch 'PHP-5.4' into PHP-5.5

* PHP-5.4:
  backport this piece from 5.6, related to the #66307 fix
  Fixed bug #66307 Fileinfo crashes with powerpoint files