Merge pull request #308 from bocoup/for-of-built-ins

test/language/statements/for-of/int8array.js

test/language/statements/for-of/map-contract-expand.js

test/language/statements/for-of/map-contract.js

test/language/statements/for-of/map-expand-contract.js

test/language/statements/for-of/map-expand.js

test/language/statements/for-of/map.js

test/language/statements/for-of/set-contract-expand.js

test/language/statements/for-of/set-contract.js

test/language/statements/for-of/set-expand-contract.js

test/language/statements/for-of/set-expand.js

test/language/statements/for-of/set.js

test/language/statements/for-of/string-astral-truncated.js

test/language/statements/for-of/string-astral.js

test/language/statements/for-of/string-bmp.js

test/language/statements/for-of/uint16array-mutate.js

test/language/statements/for-of/uint16array.js

test/language/statements/for-of/uint32array-mutate.js

test/language/statements/for-of/uint32array.js

test/language/statements/for-of/uint8array-mutate.js

test/language/statements/for-of/uint8array.js