libwebsockets: bump to 2.2.1

Changelog is
https://github.com/warmcat/libwebsockets/blob/v2.2.1/changelog

Since 2.0.3, the last version packaged, banner highlights are:

* mountains of work on lws being it's own webserver
* fixes apparently, but they don't get changelog entries.

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

libs/libwebsockets/Makefile

@@ -8,13 +8,13 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libwebsockets
-PKG_VERSION:=2.0.3
+PKG_VERSION:=2.2.1
 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_MD5SUM:=a025156d606d90579e65d53ccd062a94
+PKG_HASH:=e7f9eaef258e003c9ada0803a9a5636757a5bc0a58927858834fb38a87d18ad2
 
 
 PKG_SOURCE_VERSION:=v$(PKG_VERSION)