tiff: add upstream security fixes

tiff: add upstream security fixes

Add upstream post-4.0.7 commits (except for ChangeLog modifications) fixing
the following security issues:

CVE-2016-10266 - LibTIFF 4.0.7 allows remote attackers to cause a denial of
service (divide-by-zero error and application crash) via a crafted TIFF
image, related to libtiff/tif_read.c:351:22.

CVE-2016-10267 - LibTIFF 4.0.7 allows remote attackers to cause a denial of
service (divide-by-zero error and application crash) via a crafted TIFF
image, related to libtiff/tif_ojpeg.c:816:8.

CVE-2016-10269 - LibTIFF 4.0.7 allows remote attackers to cause a denial of
service (heap-based buffer over-read) or possibly have unspecified other
impact via a crafted TIFF image, related to "READ of size 512" and
libtiff/tif_unix.c:340:2.

CVE-2016-10270 - LibTIFF 4.0.7 allows remote attackers to cause a denial of
service (heap-based buffer over-read) or possibly have unspecified other
impact via a crafted TIFF image, related to "READ of size 8" and
libtiff/tif_read.c:523:22.

CVE-2017-5225 - LibTIFF version 4.0.7 is vulnerable to a heap buffer
overflow in the tools/tiffcp resulting in DoS or code execution via a
crafted BitsPerSample value.

CVE-2017-7592 - The putagreytile function in tif_getimage.c in LibTIFF 4.0.7
has a left-shift undefined behavior issue, which might allow remote
attackers to cause a denial of service (application crash) or possibly have
unspecified other impact via a crafted image.

CVE-2017-7593 - tif_read.c in LibTIFF 4.0.7 does not ensure that tif_rawdata
is properly initialized, which might allow remote attackers to obtain
sensitive information from process memory via a crafted image.

CVE-2017-7594 - The OJPEGReadHeaderInfoSecTablesDcTable function in
tif_ojpeg.c in LibTIFF 4.0.7 allows remote attackers to cause a denial of
service (memory leak) via a crafted image.

CVE-2017-7595 - The JPEGSetupEncode function in tiff_jpeg.c in LibTIFF 4.0.7
allows remote attackers to cause a denial of service (divide-by-zero error
and application crash) via a crafted image.

CVE-2017-7598 - tif_dirread.c in LibTIFF 4.0.7 might allow remote attackers
to cause a denial of service (divide-by-zero error and application crash)
via a crafted image.

CVE-2017-7601 - LibTIFF 4.0.7 has a "shift exponent too large for 64-bit
type long" undefined behavior issue, which might allow remote attackers to
cause a denial of service (application crash) or possibly have unspecified
other impact via a crafted image.

CVE-2017-7602 - LibTIFF 4.0.7 has a signed integer overflow, which might
allow remote attackers to cause a denial of service (application crash) or
possibly have unspecified other impact via a crafted image.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>