obfuscate: Simplify TRACE logging / make it more uniform
obfuscate: Simplify TRACE logging / make it more uniform

Summary: Just some minor changes I made while debugging issues with ObfuscatePass.

Reviewed By: justinjhendrick

Differential Revision: D7152210

fbshipit-source-id: bc5d14abdf6bf8cdf8ff6a352b3b2a24f8210add

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