Bug 988561 - Make jit-test testBug686274.js run faster with non-default JIT flags. r=luke

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extra : rebase_source : 4a85e97bf3db0359b375de564204f162238abc12
Bug 988418 - Remove some unused OSR code. r=nbp

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extra : rebase_source : 5c2594d82a97cea4ca05d6b24aba8dcc31fccd8a
Bug 988475 - Rename IonFrame_* enum to JitFrame_*. r=nbp

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extra : rebase_source : 597e04cf1c6bcd2a177d1bc1386d222f8cb62a6d