Add tests for DataView.prototype.getUint16

...otype/getUint16/byteoffset-is-different-integer-throws.js

...View/prototype/getUint16/byteoffset-is-negative-throws.js

...ype/getUint16/detached-buffer-after-integer-byteoffset.js

...getUint16/detached-buffer-before-outofrange-byteoffset.js

...built-ins/DataView/prototype/getUint16/detached-buffer.js

...ins/DataView/prototype/getUint16/index-is-out-of-range.js

...etUint16/return-abrupt-from-tonumber-byteoffset-symbol.js

...otype/getUint16/return-abrupt-from-tonumber-byteoffset.js

...iew/prototype/getUint16/return-value-clean-arraybuffer.js

...w/prototype/getUint16/return-values-coerced-byteoffset.js

...taView/prototype/getUint16/return-values-custom-offset.js

test/built-ins/DataView/prototype/getUint16/return-values.js

...View/prototype/getUint16/this-has-no-dataview-internal.js

...lt-ins/DataView/prototype/getUint16/this-is-not-object.js

...s/DataView/prototype/getUint16/to-boolean-littleendian.js