Crash when trying to display the comic introduction

Using system-provided Mono 6.8.0.105, the game crashes when it should display the comic introduction, with the following trace:

[ERROR] FATAL UNHANDLED EXCEPTION: System.DllNotFoundException: libRotor.so assembly:<unknown assembly> type:<unknown type> member:(null)
  at (wrapper managed-to-native) #=qWJ4HGJQiEdtEm6MWK6wX$Q==.#=qNl7gCxZWsOFgHXtmwYgGWw==(byte*,uint)
  at #=qWJ4HGJQiEdtEm6MWK6wX$Q==.#=qu3Z9g9rfPHTf9mGNLEhjCA== (System.Byte[] #=qzPfaVvTYNxgPZMPUIAGRIlrx9NVGXFtJzfPNdJGAQds=) [0x0001a] in <b64376083c4141ed9b86c0aad545952f>:0
  at #=qWJ4HGJQiEdtEm6MWK6wX$Q==.#=qXoAMbc89n6IFUuaWA79pew== (System.IO.Stream #=qtZSE2t04S_CDJDvJe3ybSg==) [0x00013] in <b64376083c4141ed9b86c0aad545952f>:0
  at Pressurizer.TextureRef.SetFromPngStream (System.String name, System.IO.Stream pngStream) [0x00000] in <b64376083c4141ed9b86c0aad545952f>:0
  at Pressurizer.ComicContent.Load (System.String filename) [0x00067] in <b64376083c4141ed9b86c0aad545952f>:0
  at Pressurizer.ComicContent+#=qO48_BfyXJGf$AZD$K4PD8Q==.#=qU__5QWLwNB2PsfYL4w2KCQ== () [0x0000d] in <b64376083c4141ed9b86c0aad545952f>:0
  at #=qt_0rAqwAdzm8WTSJAikfFLwn8rm$R4aNTN3kg$klFuo=.#=qMNac9f1T_sdePQRShZYVqQ== (#=q9wGfd1CJZ2SsGTuo6ROnGnZLyjs6cNwUdiPwjqs36Jc= #=qF$2lr0Tl6bzwGshnmkrz_w==) [0x0008e] in <b64376083c4141ed9b86c0aad545952f>:0
  at #=qqPvxjM6oO_$2LviSC3bQA2Ic0hexX8sXlTayuqb5894=[#=qnrVH0vw82Tw2NNo0UVRcsA==].#=qL2UZo07T0cLD0sblob3L2A== (Impeller.Matrix4& #=qyKz69NVUrxKs5WnE4Jh4NQ==, #=qG$RzWGNG8CHZnv8TVedMisnnG515CnzGPF3VJ4fNp6E= #=qivle0jaEj9bNTqamDswfZQ==) [0x00028] in <b64376083c4141ed9b86c0aad545952f>:0
  at #=q1cGqZA3Z8MZu$98OlVfQaRrNZ7ei8$NEhpJ1hNNgr9Q=.#=qL2UZo07T0cLD0sblob3L2A== (Impeller.Matrix4& #=qZ4pcA2VIFATTQGREA1hRQw==, #=qG$RzWGNG8CHZnv8TVedMisnnG515CnzGPF3VJ4fNp6E= #=q9M_oPsVYdGk07dv7axrWWQ==) [0x0000f] in <b64376083c4141ed9b86c0aad545952f>:0
  at #=q1cGqZA3Z8MZu$98OlVfQaRrNZ7ei8$NEhpJ1hNNgr9Q=.#=qL2UZo07T0cLD0sblob3L2A== (Impeller.Matrix4& #=qZ4pcA2VIFATTQGREA1hRQw==, #=qG$RzWGNG8CHZnv8TVedMisnnG515CnzGPF3VJ4fNp6E= #=q9M_oPsVYdGk07dv7axrWWQ==) [0x0000f] in <b64376083c4141ed9b86c0aad545952f>:0
  at #=qHr4RQLB0O1jIRrhiZQblMBaDhM2Os3Oxa2GdvppW1Ac=.#=qL2UZo07T0cLD0sblob3L2A== (Impeller.Matrix4& #=qmHscRMHWSdN2hTmnxe9gYQ==, #=qG$RzWGNG8CHZnv8TVedMisnnG515CnzGPF3VJ4fNp6E= #=qhSqj4JaFWbZTFRaEhRcQow==) [0x0001c] in <b64376083c4141ed9b86c0aad545952f>:0
  at #=q1cGqZA3Z8MZu$98OlVfQaRrNZ7ei8$NEhpJ1hNNgr9Q=.#=qL2UZo07T0cLD0sblob3L2A== (Impeller.Matrix4& #=qZ4pcA2VIFATTQGREA1hRQw==, #=qG$RzWGNG8CHZnv8TVedMisnnG515CnzGPF3VJ4fNp6E= #=q9M_oPsVYdGk07dv7axrWWQ==) [0x0000f] in <b64376083c4141ed9b86c0aad545952f>:0
  at #=qeA8jDy4bDcyBSftWiq_11mCnGLnS9gRYQfISuC3supI=.#=qL2UZo07T0cLD0sblob3L2A== (Impeller.Matrix4& #=qO5VOk5CdwivRBnXIr1$DeA==, #=qG$RzWGNG8CHZnv8TVedMisnnG515CnzGPF3VJ4fNp6E= #=qn94U3dXQFj55t$58G1YTsg==) [0x00000] in <b64376083c4141ed9b86c0aad545952f>:0
  at Impeller.Scene.HandleEvent (#=qG$RzWGNG8CHZnv8TVedMisnnG515CnzGPF3VJ4fNp6E= sceneEvent) [0x00006] in <b64376083c4141ed9b86c0aad545952f>:0
  at #=q3sctHFGigp71WuA6iL9NlnUpTX9rtlpaqCaQpflT7Gg=.#=qXrhpysIijJIC4wCz6yCtyQ== (System.Double #=qZdqAiSNbFeyU72plHhG1iQ==) [0x00083] in <b64376083c4141ed9b86c0aad545952f>:0
  at #=qHl0qM6f_mOv6EaEU1$D0ifHsH2llK_GE05kj$_X4ZQk=.#=q8I1dBbfA3XQ6Smha7GkoYA== (System.Double #=qxy0Wk4vQGi$yGLZkButExA==) [0x00075] in <b64376083c4141ed9b86c0aad545952f>:0
  at #=qzpze_qrj7eEwPk0uYJCQNshb6lCDPQNBqEoVHqUrWIM=.#=qVi3lLr3wPY5Bie9BbwsyAQ== () [0x00084] in <b64376083c4141ed9b86c0aad545952f>:0
  at #=q0du55HkWxtHdbETq5SKLAaA8CJLBNRQFOuk_plSx55E=.#=qAIu65PM70GpdJcnU_XncIQ== () [0x0013b] in <b64376083c4141ed9b86c0aad545952f>:0
  at #=q0du55HkWxtHdbETq5SKLAaA8CJLBNRQFOuk_plSx55E=.#=qOLnLBRGWppuvAL6I6M_YmA== (System.String[] #=qsCDWjBtDAJYFISzG3qUX7Q==) [0x00080] in <b64376083c4141ed9b86c0aad545952f>:0
Cannot open assembly '/usr/bin/ZISupportTool.exe': No such file or directory.

To work around it, we use the shipped 32-bit Mono build instead of the system-provided one.
