package/wireshark: add lua optional dependency

- lua 5.3 or luajit is not supported
- Don't specify the path to find lua as pkgconfig is used for lua
  (this is not the case for the other options)

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/wireshark/wireshark.mk

@@ -22,7 +22,6 @@ WIRESHARK_CONF_OPTS = \
 	--without-krb5 \
 	--enable-static=no \
 	--with-libsmi=no \
-	--with-lua=no \
 	--with-pcap=$(STAGING_DIR)/usr \
 	--includedir=$(STAGING_DIR)/usr/include
 
@@ -99,6 +98,14 @@ else
 WIRESHARK_CONF_OPTS += --without-libssh
 endif
 
+# no support for lua53 yet
+ifeq ($(BR2_PACKAGE_LUA_5_1)$(BR2_PACKAGE_LUA_5_2),y)
+WIRESHARK_CONF_OPTS += --with-lua
+WIRESHARK_DEPENDENCIES += lua
+else
+WIRESHARK_CONF_OPTS += --without-lua
+endif
+
 ifeq ($(BR2_PACKAGE_SBC),y)
 WIRESHARK_CONF_OPTS += --with-sbc=yes
 WIRESHARK_DEPENDENCIES += sbc