Add this value object testing to trimEnd

...mEnd/this-value-object-cannot-convert-to-primitive-err.js

...ototype/trimEnd/this-value-object-toprimitive-call-err.js

...ototype/trimEnd/this-value-object-toprimitive-meth-err.js

...pe/trimEnd/this-value-object-toprimitive-meth-priority.js

...imEnd/this-value-object-toprimitive-returns-object-err.js

.../prototype/trimEnd/this-value-object-tostring-call-err.js

.../prototype/trimEnd/this-value-object-tostring-meth-err.js

...otype/trimEnd/this-value-object-tostring-meth-priority.js

.../trimEnd/this-value-object-tostring-returns-object-err.js

...g/prototype/trimEnd/this-value-object-valueof-call-err.js

...g/prototype/trimEnd/this-value-object-valueof-meth-err.js

...totype/trimEnd/this-value-object-valueof-meth-priority.js

...e/trimEnd/this-value-object-valueof-returns-object-err.js