rsync: use system zlib and popt, also do not lose debug options

rsync by default compiles statically its own zlib and popt
libraries, it is better to use system wide libraries instead -
both for disk and memory consumption. Change rsync package
accordingly.

Also previously a debug configure option has been lost, as
overwritten by '--with-included-popt' option - fixed.

For example, on ARMv5 rsync binary size is reduced by about 25%.

Signed-off-by: Denis Mingulov <denis@mingulov.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/rsync/Config.in

@@ -2,6 +2,8 @@ config BR2_PACKAGE_RSYNC
 	bool "rsync"
 	# fork()
 	depends on BR2_USE_MMU
+	select BR2_PACKAGE_ZLIB
+	select BR2_PACKAGE_POPT
 	help
 	  File transfer program to keep remote files in sync.
 

package/rsync/rsync.mk

@@ -8,7 +8,10 @@ RSYNC_VERSION = 3.1.0
 RSYNC_SITE = http://rsync.samba.org/ftp/rsync/src
 RSYNC_LICENSE = GPLv3+
 RSYNC_LICENSE_FILES = COPYING
-RSYNC_CONF_OPT = $(if $(BR2_ENABLE_DEBUG),--enable-debug,--disable-debug)
-RSYNC_CONF_OPT = --with-included-popt
+RSYNC_DEPENDENCIES = zlib popt
+RSYNC_CONF_OPT = \
+	$(if $(BR2_ENABLE_DEBUG),--enable-debug,--disable-debug) \
+	--with-included-zlib=no \
+	--with-included-popt=no
 
 $(eval $(autotools-package))