jamvm: classpath needs ipv6, so jamvm as well

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/jamvm/Config.in

@@ -1,5 +1,6 @@
 config BR2_PACKAGE_JAMVM
 	bool "jamvm"
+	depends on BR2_INET_IPV6
 	select BR2_PACKAGE_ZLIB
 	select BR2_PACKAGE_CLASSPATH
 	help
@@ -7,3 +8,6 @@ config BR2_PACKAGE_JAMVM
 	  JVM specification version 2 (blue book).
 
 	  http://jamvm.sf.net
+
+comment "jamvm requires a toolchain with IPV6 support"
+	depends on !BR2_INET_IPV6