[ngUpgrade externs] Add an externs entry for `JQLite.prototype.cleanData`.
[ngUpgrade externs] Add an externs entry for `JQLite.prototype.cleanData`.

`cleanData` is an undocumented jQuery method that is also included and (also) undocumented in JQLite, but relied upon for ngUpgrade.  Without this entry, clients cannot enable property_renaming for ngUpgrade applications that downgrade components.

See: https://stackoverflow.com/a/7084015
See: https://github.com/angular/angular/blob/master/packages/upgrade/src/common/upgrade_helper.ts#L134

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=222846806

shantanusharma/closure-compiler,monetate/closure-compiler,ChadKillingsworth/closure-compiler,vobruba-martin/closure-compiler,nawawi/closure-compiler,shantanusharma/closure-compiler,vobruba-martin/closure-compiler,ChadKillingsworth/closure-compiler,Yannic/closure-compiler,vobruba-martin/closure-compiler,Yannic/closure-compiler,Yannic/closure-compiler,nawawi/closure-compiler,monetate/closure-compiler,shantanusharma/closure-compiler,ChadKillingsworth/closure-compiler,vobruba-martin/closure-compiler,google/closure-compiler,google/closure-compiler,shantanusharma/closure-compiler,Yannic/closure-compiler,monetate/closure-compiler,ChadKillingsworth/closure-compiler,google/closure-compiler,nawawi/closure-compiler,nawawi/closure-compiler,google/closure-compiler,monetate/closure-compiler