libwebsockets: use tarball releases instead of git

Signed-off-by: Denis Osvald <denis.osvald@sartura.hr>

libs/libwebsockets/Makefile

@@ -11,10 +11,12 @@ PKG_NAME:=libwebsockets
 PKG_VERSION:=2.0.3
 PKG_RELEASE:=1
 
-PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
-PKG_SOURCE_PROTO:=git
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
-PKG_SOURCE_URL:=https://github.com/warmcat/libwebsockets.git
+PKG_SOURCE_URL:=https://codeload.github.com/warmcat/libwebsockets/tar.gz/v$(PKG_VERSION)?
+PKG_MD5SUM:=a025156d606d90579e65d53ccd062a94
+
+
 PKG_SOURCE_VERSION:=v$(PKG_VERSION)
 
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(BUILD_VARIANT)/$(PKG_SOURCE_SUBDIR)