python*-pylint: upgrade to v1.7.2 and fix qa error

Fix file-rdeps error about "#!/usr/bin/python" in python3-pylint
by inheriting python*-dir so we can change to "#!/usr/bin/env ${PYTHON_PN}"
in ${PYTHON_SITEPACKAGES_DIR}.

Signed-off-by: Tim Orling <timothy.t.orling@linux.intel.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-python/recipes-devtools/python/python-pylint_1.7.2.bb

@@ -0,0 +1,4 @@
+inherit setuptools python-dir
+require python-pylint.inc
+
+RDEPENDS_${PN} += "${PYTHON_PN}-backports-functools-lru-cache"