package/python-pyyaml: security bump to version 5.3.1

Fixes the following security issue:

 386: Prevents arbitrary code execution during python/object/new
 constructor

yaml/pyyaml#386

The hash of the license file changed due to the following diff:

-Copyright (c) 2017-2019 Ingy döt Net
+Copyright (c) 2017-2020 Ingy döt Net

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 9063df4)
[Peter: mention security impact]
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/python-pyyaml/python-pyyaml.hash

@@ -1,5 +1,5 @@
 # md5, sha256 from https://pypi.org/pypi/PyYAML/json
-md5	adbb0d336b509d6472d3b095a0f1cf30  PyYAML-5.3.tar.gz
-sha256	e9f45bd5b92c7974e59bcd2dcc8631a6b6cc380a904725fce7bc08872e691615  PyYAML-5.3.tar.gz
+md5  d3590b85917362e837298e733321962b  PyYAML-5.3.1.tar.gz
+sha256  b8eac752c5e14d3eca0e6dd9199cd627518cb5ec06add0de9d32baeee6fe645d  PyYAML-5.3.1.tar.gz
 # Locally computed sha256 checksums
-sha256	a2adb9c959b797494a0ef80bdf60e22db2749ee3e0c0908556e3eb548f967c56  LICENSE
+sha256  c40112449f254b9753045925248313e9270efa36d226b22d82d4cc6c43c57f29  LICENSE

package/python-pyyaml/python-pyyaml.mk

@@ -4,9 +4,9 @@
 #
 ################################################################################
 
-PYTHON_PYYAML_VERSION = 5.3
+PYTHON_PYYAML_VERSION = 5.3.1
 PYTHON_PYYAML_SOURCE = PyYAML-$(PYTHON_PYYAML_VERSION).tar.gz
-PYTHON_PYYAML_SITE = https://files.pythonhosted.org/packages/3d/d9/ea9816aea31beeadccd03f1f8b625ecf8f645bd66744484d162d84803ce5
+PYTHON_PYYAML_SITE = https://files.pythonhosted.org/packages/64/c2/b80047c7ac2478f9501676c988a5411ed5572f35d1beff9cae07d321512c
 PYTHON_PYYAML_SETUP_TYPE = distutils
 PYTHON_PYYAML_LICENSE = MIT
 PYTHON_PYYAML_LICENSE_FILES = LICENSE