package/opkg: add bzip2 support

Signed-off-by: Adam Duskett <adam.duskett@amarulasolutions.com>
[yann.morin.1998@free.fr: drop option, use package as condition]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/opkg/opkg.mk

@@ -22,6 +22,13 @@ else
 OPKG_CONF_OPTS += --disable-gpg
 endif
 
+ifeq ($(BR2_PACKAGE_BZIP2),y)
+OPKG_DEPENDENCIES += bzip2
+OPKG_CONF_OPTS += --enable-bzip2
+else
+OPKG_CONF_OPTS += --disable-bzip2
+endif
+
 ifeq ($(BR2_PACKAGE_LZ4),y)
 OPKG_DEPENDENCIES += lz4
 OPKG_CONF_OPTS += --enable-lz4