python-lxml: bump to version 4.2.4

Version 4.2.4 has been released recently.
Update it.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

lang/python/python-lxml/Makefile

@@ -8,12 +8,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=python-lxml
-PKG_VERSION:=4.2.1
+PKG_VERSION:=4.2.4
 PKG_RELEASE:=1
 
 PKG_SOURCE:=lxml-$(PKG_VERSION).tgz
 PKG_SOURCE_URL:=http://lxml.de/files/
-PKG_HASH:=e2629cdbcad82b83922a3488937632a4983ecc0fed3e5cfbf430d069382eeb9b
+PKG_HASH:=e2afbe403090f5893e254958d02875e0732975e73c4c0cdd33c1f009a61963ca
 
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(BUILD_VARIANT)-lxml-$(PKG_VERSION)
 PKG_UNPACK=$(HOST_TAR) -C $(PKG_BUILD_DIR) --strip-components=1 -xzf $(DL_DIR)/$(PKG_SOURCE)