busybox: enable sha256sum by default

Now that snapshot builds are only publishing SHA-256 checksums, it makes
sense to ship an appropriate utility for verification.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

package/utils/busybox/Config-defaults.in

@@ -705,7 +705,7 @@ config BUSYBOX_DEFAULT_SHA1SUM
 	default n
 config BUSYBOX_DEFAULT_SHA256SUM
 	bool
-	default n
+	default y
 config BUSYBOX_DEFAULT_SHA512SUM
 	bool
 	default n

package/utils/busybox/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=busybox
 PKG_VERSION:=1.24.2
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 PKG_FLAGS:=essential
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2