Bug 1102964 - Fix optimized build unused variable warnings in jit/. r=sunfish

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extra : rebase_source : 936082739eb5ea0da62e10a408b8601cb6622cc2
Bug 1102964 - Fix optimized build unused variables warnings in Debugger.cpp. r=jimb

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extra : rebase_source : 6fb34b6132bf588d0105cb50d1d7080db65022aa