xarchiver: add unzip to RRECOMMENDS_${PN}

opening *.zip caused:
Failed to execute child process "zipinfo" (No such file or directory)

Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-xfce/recipes-apps/xarchiver/xarchiver_0.5.2.bb

@@ -1,7 +1,7 @@
 DESCRIPTION = "Lightweight, desktop independent GTK+ archive manager"
 HOMEPAGE = "http://xarchiver.sourceforge.net"
 SECTION = "x11"
-PR = "r1"
+PR = "r2"
 
 LICENSE = "GPLv2+"
 LIC_FILES_CHKSUM = "file://COPYING;md5=94d55d512a9ba36caa9b7df079bae19f"
@@ -14,4 +14,4 @@ SRC_URI[sha256sum] = "cea932ff9d505969201fd502470bbebbc5726ab3d6765e142fc8295aa6
 
 inherit gettext pkgconfig autotools gtk-icon-cache
 
-RRECOMMENDS_${PN} = "lzop zip tar bzip2"
+RRECOMMENDS_${PN} = "lzop zip tar bzip2 unzip"