fix $.agent to $262.agent (#876)

test/built-ins/Atomics/wait/did-timeout.js

test/built-ins/Atomics/wait/good-views.js

test/built-ins/Atomics/wait/nan-timeout.js

test/built-ins/Atomics/wait/negative-timeout.js

test/built-ins/Atomics/wait/no-spurious-wakeup.js

test/built-ins/Atomics/wait/was-woken.js

test/built-ins/Atomics/wake/wake-all-on-loc.js

test/built-ins/Atomics/wake/wake-all.js

test/built-ins/Atomics/wake/wake-in-order.js

test/built-ins/Atomics/wake/wake-nan.js

test/built-ins/Atomics/wake/wake-negative.js

test/built-ins/Atomics/wake/wake-one.js

test/built-ins/Atomics/wake/wake-two.js

test/built-ins/Atomics/wake/wake-zero.js

test/built-ins/DataView/proto-from-ctor-realm-sab.js

test/built-ins/SharedArrayBuffer/proto-from-ctor-realm.js

...t-ins/TypedArrays/buffer-arg-proto-from-ctor-realm-sab.js