Replace runTestCase with assert helpers [test/built-ins/Array/prototype/filter]

test/built-ins/Array/prototype/filter/15.4.4.20-0-1.js

test/built-ins/Array/prototype/filter/15.4.4.20-0-2.js

test/built-ins/Array/prototype/filter/15.4.4.20-1-11.js

test/built-ins/Array/prototype/filter/15.4.4.20-1-12.js

test/built-ins/Array/prototype/filter/15.4.4.20-1-14.js

test/built-ins/Array/prototype/filter/15.4.4.20-1-15.js

test/built-ins/Array/prototype/filter/15.4.4.20-1-4.js

test/built-ins/Array/prototype/filter/15.4.4.20-1-6.js

test/built-ins/Array/prototype/filter/15.4.4.20-1-7.js

test/built-ins/Array/prototype/filter/15.4.4.20-1-8.js

test/built-ins/Array/prototype/filter/15.4.4.20-1-9.js

test/built-ins/Array/prototype/filter/15.4.4.20-10-1.js

test/built-ins/Array/prototype/filter/15.4.4.20-10-2.js

test/built-ins/Array/prototype/filter/15.4.4.20-10-3.js

test/built-ins/Array/prototype/filter/15.4.4.20-10-4.js

test/built-ins/Array/prototype/filter/15.4.4.20-2-1.js

test/built-ins/Array/prototype/filter/15.4.4.20-2-10.js

test/built-ins/Array/prototype/filter/15.4.4.20-2-11.js

test/built-ins/Array/prototype/filter/15.4.4.20-2-13.js

test/built-ins/Array/prototype/filter/15.4.4.20-2-14.js