Fails on reject-current-rule

```
$ apertium-preprocess-transfer-bytecode-j apertium-sme-nob.sme-nob.t1x /dev/null
WARNING: Macro set_neverdet is not defined. Ignoring call. Defined macros are: [guess_animacy, set_c_gen_nbr, maybe_det_nbr_to_adj, set_caseFirstWord, modify_prn_case, set_defnes, reset_caseFirstWord, switch_cases, copy_syn_label, set_prn_gen_nbr_art2, clean_det, modify_adj_gen_nbr, set_foc-word, set_caseprep, clean_cmp, set_defnes2] - for ///
Exception in thread "main" java.lang.UnsupportedOperationException: Not yet implemented:processInstruction(n = reject-current-rule - for //////
at org.apertium.transfer.generation.TransferBytecode.throwParseError(TransferBytecode.java:821)
at org.apertium.transfer.generation.TransferBytecode.processInstruction(TransferBytecode.java:468)
at org.apertium.transfer.generation.TransferBytecode.processChoose(TransferBytecode.java:652)
at org.apertium.transfer.generation.TransferBytecode.processInstruction(TransferBytecode.java:456)
at org.apertium.transfer.generation.TransferBytecode.writeMethodBody(TransferBytecode.java:106)
at org.apertium.transfer.generation.TransferBytecode.(TransferBytecode.java:1220)
at org.apertium.transfer.generation.TransferBytecode.main(TransferBytecode.java:1329)
at org.apertium.CommandLineInterface.main(CommandLineInterface.java:114)

```
See docs for reject-current-rule: https://github.com/apertium/apertium/blob/master/apertium/transfer.dtd#L457