sunxi-tools: fix github tarball to use commit id

Signed-off-by: Spenser Gilliland <spenser@gillilanding.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/sunxi-tools/sunxi-tools.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 SUNXI_TOOLS_VERSION = 3a94e721dd8d1e13d0b25da0a83463891e8e9ee0
-SUNXI_TOOLS_SITE = http://github.com/linux-sunxi/sunxi-tools/tarball/master
+SUNXI_TOOLS_SITE = http://github.com/linux-sunxi/sunxi-tools/tarball/$(SUNXI_TOOLS_VERSION)
 SUNXI_TOOLS_LICENSE = GPLv2+
 SUNXI_TOOLS_LICENSE_FILES = COPYING
 HOST_SUNXI_TOOLS_DEPENDENCIES = host-libusb