Fix @extend -> @extends in crypto.js
Fix @extend -> @extends in crypto.js

This was causing the following error:

crypto.js:259: WARNING - Parse error. illegal use of unknown JSDoc tag "extend"; ignoring it
 * @extend stream.Writable
   ^

Signed-off-by: Kevin Locke <ffb4761cba839470133bee36aeb139f58d7dbaa9@kevinlocke.name>

keunwoo/node.js-closure-compiler-externs,dcodeIO/node.js-closure-compiler-externs