Katana BUG (loops) in experiments9 soclayout

using latest git of coriolis2 and soclayout experiments9 libre-soc

commit e1c0e8550af2c5a97bd8298af0b4b3be4d7da0ea
Author: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date:   Tue Aug 11 14:08:20 2020 +0000

    test_issuer.il with an alternative read/write port bus structure
    brings gate count down quite a lot

commit a91b92acfa623c6052edf69f50774d452d1f1632
Author: Jean-Paul Chaput <Jean-Paul.Chaput@lip6.fr>
Date:   Fri Aug 7 13:35:53 2020 +0200

    Bug, forgotten self in block.Side (thanks LKCL).

[BUG] Katana has detected a loop between the following Segments:
        71| &<id:3584142 Horizontal subckt_1153_core.subckt_4072_fus.subckt_6_mul0.subckt_887_alu_mul0.subckt_1_mul_pipe2.subckt_590_mul2.abc_357898_new_n9802 METAL2 [12580l 5370l] [12610l 5370l] 2l rpD:15 -----CG------A----tt- [12579l:12611l] 32l 1----s->
         8| &<id:3588550 Horizontal subckt_1153_core.subckt_4072_fus.subckt_6_mul0.subckt_887_alu_mul0.subckt_1_mul_pipe2.subckt_590_mul2.abc_357898_new_n7956 METAL2 [12570l 5370l] [12585l 5370l] 2l rpD:0 ----UC---T---A----tb- [12569l:12586l] 17l 1--T-s->
        14| &<id:2135948 Horizontal subckt_1153_core.subckt_4072_fus.subckt_6_mul0.subckt_887_alu_mul0.subckt_1_mul_pipe2.subckt_590_mul2.abc_357898_new_n7958 METAL2 [12545l 5375l] [12590l 5375l] 2l rpD:2 -----CG-----w-----tt- [12544l:12591l] 47l 0--T--t>
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