python-pexpect: upgrade to 4.2.1

python-pexpect needs to be upgraded to latest upstream version.
This change was tested using qemux86 with core-image-sato

(From OE-Core rev: 3778171260e02a1054790418b5117db587315321)

Signed-off-by: Jose Lamego <jose.a.lamego@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/python/python-pexpect_4.2.1.bb

@@ -0,0 +1,28 @@
+SUMMARY = "A Pure Python Expect like Module for Python"
+HOMEPAGE = "http://pexpect.readthedocs.org/"
+SECTION = "devel/python"
+LICENSE = "ISC"
+LIC_FILES_CHKSUM = "file://LICENSE;md5=1c7a725251880af8c6a148181665385b"
+
+SRCNAME = "pexpect"
+
+SRC_URI = "https://files.pythonhosted.org/packages/source/p/${SRCNAME}/${SRCNAME}-${PV}.tar.gz"
+SRC_URI[md5sum] = "3694410001a99dff83f0b500a1ca1c95"
+SRC_URI[sha256sum] = "3d132465a75b57aa818341c6521392a06cc660feb3988d7f1074f39bd23c9a92"
+
+UPSTREAM_CHECK_URI = "https://pypi.python.org/pypi/pexpect"
+
+S = "${WORKDIR}/pexpect-${PV}"
+
+inherit setuptools
+
+RDEPENDS_${PN} = "\
+    python-core \
+    python-io \
+    python-terminal \
+    python-resource \
+    python-fcntl \
+    python-ptyprocess \
+"
+
+BBCLASSEXTEND = "nativesdk"