Each LInstruction is now a subclass of LTemplateInstruction<R, I, T>

where R is number of outputs, I number of inputs and T number of temps.

This change only actually uses the parameter I for input operands. 
Since the parameter T for temps is 0, it incurs no extra cost. 

A separate change will introduce using the temps parameter.

Review URL: http://codereview.chromium.org/6215002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6275 ce2b1a6d-e550-0410-aec6-3dcde31c8c00