PHP 5.6.37

- Exif:
. Fixed bug #76423 (Int Overflow lead to Heap OverFlow in
exif_thumbnail_extract of exif.c). (Stas)
. Fixed bug #76557 (heap-buffer-overflow (READ of size 48) while reading exif
data). (Stas)

- Win32:
. Fixed bug #76459 (windows linkinfo lacks openbasedir check). (Anatol)