beanstalkd: switch to xz compression and add PKG_HASH

Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>

net/beanstalkd/Makefile

@@ -11,8 +11,9 @@ PKG_SOURCE_VERSION:=b7b4a6a14b7e8d096dc8cbc255b23be17a228cbb
 
 PKG_SOURCE_PROTO:=git
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-v$(PKG_VERSION)
-PKG_SOURCE:=$(PKG_NAME)-$(PKG_SOURCE_VERSION).tar.gz
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_SOURCE_VERSION).tar.xz
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)-v$(PKG_VERSION)
+PKG_HASH:=6d5155ab347b731640495b1f0df6a4a849e84194d2ef0c2ec6af3879ee1aca2c
 
 PKG_MAINTAINER:=Philip Prindeville <philipp@redfish-solutions.com>
 PKG_LICENSE:=MIT