Replace runTestCase with assert helpers, rest [test/built-ins]

test/built-ins/Date/prototype/toISOString/15.9.5.43-0-10.js

test/built-ins/Date/prototype/toISOString/15.9.5.43-0-13.js

test/built-ins/Date/prototype/toISOString/15.9.5.43-0-9.js

test/built-ins/Error/prototype/message/15.11.4.3-1.js

test/built-ins/Error/prototype/name/15.11.4.2-1.js

test/built-ins/Function/15.3.2.1-11-2-s.js

test/built-ins/Function/15.3.2.1-11-4-s.js

test/built-ins/Function/15.3.2.1-11-6-s.js

test/built-ins/Function/15.3.2.1-11-7-s.js

test/built-ins/Function/prototype/bind/15.3.4.5-2-16.js

test/built-ins/Function/prototype/bind/15.3.4.5-20-2.js

test/built-ins/Function/prototype/bind/15.3.4.5-21-2.js

test/built-ins/JSON/parse/15.12.1.1-0-1.js

test/built-ins/JSON/parse/15.12.1.1-0-2.js

test/built-ins/JSON/parse/15.12.1.1-0-3.js

test/built-ins/JSON/parse/15.12.1.1-0-4.js

test/built-ins/JSON/parse/15.12.1.1-0-5.js

test/built-ins/JSON/parse/15.12.1.1-0-6.js

test/built-ins/JSON/parse/15.12.1.1-0-7.js

test/built-ins/JSON/parse/15.12.1.1-0-8.js