base-files: rc.common: fix missing EXTRA_HELP texts

Commit ed5b9129d7 ("base-files: implement generic service_running")
has added EXTRA_HELP variable, thus overriding already available
EXTRA_HELP text available in other init scripts, resulting in the
missing help text from services like dropbear for example.

So fix this regression by appending EXTRA_HELP text provided by the
other init scripts into the one provided by the script itself.

Fixes: ed5b9129d7 ("base-files: implement generic service_running")
Signed-off-by: Peter Stadler <peter.stadler@student.uibk.ac.at>
[commit title/description facelift, fixes tag, fixed From:, pkg bump]
Signed-off-by: Petr Štetiar <ynezz@true.cz>

package/base-files/Makefile

@@ -12,7 +12,7 @@ include $(INCLUDE_DIR)/version.mk
 include $(INCLUDE_DIR)/feeds.mk
 
 PKG_NAME:=base-files
-PKG_RELEASE:=208
+PKG_RELEASE:=209
 PKG_FLAGS:=nonshared
 
 PKG_FILE_DEPENDS:=$(PLATFORM_DIR)/ $(GENERIC_PLATFORM_DIR)/base-files/

package/base-files/files/etc/rc.common

@@ -109,7 +109,7 @@ ${INIT_TRACE:+set -x}
 	EXTRA_HELP="\
 	running	Check if service is running
 	status	Service status
-	"
+${EXTRA_HELP}"
 
 	. $IPKG_INSTROOT/lib/functions/procd.sh
 	basescript=$(readlink "$initscript")