libpng: whitelist CVE-2019-17371
This is actually a memory leak in gif2png 2.x, so whitelist it in the libpng
recipe.
(From OE-Core rev: 341e43ebd935daeb592cb073bf00f80c49a8ec2d)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Conflicts:
meta/recipes-multimedia/libpng/libpng_1.6.37.bb