Not recognizing no-return windows syscall

[pgoodman]

mcsema-disass does not recognize this call to RtlFailFast as a no-return instruction, and so the following innocuous errors pop up:

E1109 19:37:00.836913 12635 Function.cpp:437] Block 140005e0b has no terminator, and instruction at 140005e10 is not a local no-return function call.

[artemdinaburg]

We could (and maybe should?) treat all two-byte interrupts (opcode CD xx versus CC) as noreturn? I know technically CD 03 is still an INT3, but no sane compiler would emit it, and we officially do not support obfuscated code.

For this specific case it obviously makes more sense to call the high level handler of RtlFailFast. Maybe we could have a Windows-specific CFG recovery fix here? Or, alternatively, a Windows-specific int 0x29 handler?