base-files: move urandom seed bits into separate package

So it's possible to install or remove it as needed.

Tested-by: Lucian Cristian <lucian.cristian@gmail.com>
Signed-off-by: Petr Štetiar <ynezz@true.cz>
(cherry picked from commit 27bfde9c9f)

package/base-files/Makefile

@@ -12,7 +12,7 @@ include $(INCLUDE_DIR)/version.mk
 include $(INCLUDE_DIR)/feeds.mk
 
 PKG_NAME:=base-files
-PKG_RELEASE:=197
+PKG_RELEASE:=198
 PKG_FLAGS:=nonshared
 
 PKG_FILE_DEPENDS:=$(PLATFORM_DIR)/ $(GENERIC_PLATFORM_DIR)/base-files/
@@ -43,6 +43,15 @@ define Package/base-files
   VERSION:=$(PKG_RELEASE)-$(REVISION)
 endef
 
+define Package/urandom-seed
+  SECTION:=base
+  CATEGORY:=Base system
+  DEPENDS:=+libc +ubox-getrandom
+  TITLE:=/etc/urandom.seed handling for OpenWrt
+  URL:=http://openwrt.org/
+  VERSION:=$(PKG_RELEASE)-$(REVISION)
+endef
+
 define Package/base-files/conffiles
 /etc/config/
 /etc/config/network

package/system/urandom-seed/Makefile

@@ -0,0 +1,32 @@
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=urandom-seed
+PKG_VERSION:=1.0
+PKG_RELEASE:=1
+PKG_LICENSE:=GPL-2.0
+
+PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/$(PKG_NAME)
+  SECTION:=base
+  CATEGORY:=Base system
+  DEPENDS:=+getrandom
+  TITLE:=/etc/urandom.seed handling for OpenWrt
+  URL:=http://openwrt.org/
+endef
+
+define Build/Prepare
+	mkdir -p $(PKG_BUILD_DIR)
+endef
+
+define Build/Compile/Default
+endef
+Build/Compile = $(Build/Compile/Default)
+
+define Package/$(PKG_NAME)/install
+	$(CP) ./files/* $(1)/
+endef
+
+$(eval $(call BuildPackage,urandom-seed))