console.debug statements in nscl: SyncMessage.js and patchWindow.js

[solntcev]

Firefox, NoScript 11.4.40, debug is off

on page load plugin logs to console, probably should be tied to debug setting in options.

patchWindow.js

    console.debug(`Creating ${from}->${to} port ${portId}`); // DEV_ONLY

SyncMessage.js

    console.debug(`SyncMessage ${msgId}, state ${document.readyState}, result: ${JSON.stringify(result)}`); // DEV_ONLY