Remove (escaping) from the Swift @autoclosure parameters
Remove (escaping) from the Swift @autoclosure parameters

This was added in a993d7cbb in a misguided attempt to avoid having to
say `logText()` when passing the parameter to `SwiftLogMacro` (see [1]).
Besides being unnecessary, `@autoclosure(escaping)` actually carries a
performance penalty, it breaks the ability to reference properties and
methods on `self` without an explicit `self.` (in string
interpolations), and it makes the function look, to its callers, as
though it actually evaluates the message outside of the scope of the
function, which would be a really terrifying thing if it actually did
that.

[1]: [GitHub comment](https://github.com/CocoaLumberjack/CocoaLumberjack/pull/492#issuecomment-91104180)

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