Upvalue moho functions as part of other function calls

[ChessBerry]

Right now function arguments that are themselves functions calls don't get upvalued (as they are not even being looked at).

Hence

self.SetBreakOffTriggerMult(3, self.SetBreakOffDistanceMult(4))

gets turned into

-- Automatically upvalued moho functions for performance
local UnitMethods = _G.moho.unit_methods
local UnitMethodsSetBreakOffDistanceMult = UnitMethods.SetBreakOffDistanceMult
local UnitMethodsSetBreakOffTriggerMult = UnitMethods.SetBreakOffTriggerMult
-- End of automatically upvalued moho functions

UnitMethodsSetBreakOffTriggerMult(3, self.SetBreakOffDistanceMult(4))

but should turn into

-- Automatically upvalued moho functions for performance
local UnitMethods = _G.moho.unit_methods
local UnitMethodsSetBreakOffTriggerMult = UnitMethods.SetBreakOffTriggerMult
-- End of automatically upvalued moho functions

UnitMethodsSetBreakOffTriggerMult(3, UnitMethodsSetBreakOffDistanceMult(4))