[sledge] Simplify Sh starN and orN operations
[sledge] Simplify Sh starN and orN operations

Summary:
Previously only the Xsh operations were changed, the Sh ones were
missed.

Reviewed By: bennostein

Differential Revision: D37817320

fbshipit-source-id: 6e69f9a18dfcf9cca26f1ab1f1450c9d05a32956

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