libwebsockets: Bump to 4.2.1

Changelog at: https://libwebsockets.org/git/libwebsockets/tree/changelog?id=8a580b59b23d204ca72028370e97a8f6aa0c9202

Signed-off-by: Karl Palsson <karlp@etactica.com>

libs/libwebsockets/Makefile

@@ -8,13 +8,13 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libwebsockets
-PKG_VERSION:=4.1.6
+PKG_VERSION:=4.2.1
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
 PKG_SOURCE_URL:=https://codeload.github.com/warmcat/libwebsockets/tar.gz/v$(PKG_VERSION)?
-PKG_HASH:=402e9a8df553c9cd2aff5d7a9758e9e5285bf3070c82539082864633db3deb83
+PKG_HASH:=842da21f73ccba2be59e680de10a8cce7928313048750eb6ad73b6fa50763c51
 
 PKG_SOURCE_VERSION:=v$(PKG_VERSION)