Fast forward to sync public repo.

Compile math.sinh(), math.cosh(), math.tanh() and math.random().
Compile various io.*() functions.
Drive the GC forward on string allocations in the parser.
Improve KNUM fuse vs. load heuristics.
Add abstract C call handling to IR.

lib/bc.lua

@@ -30,7 +30,7 @@
 --   print(bc.line(foo, 2)) --> 0002    KSTR     1   1      ; "hello"
 --
 --   local out = {
---     -- Do something wich each line:
+--     -- Do something with each line:
 --     write = function(t, ...) io.write(...) end,
 --     close = function(t) end,
 --     flush = function(t) end,