Properly handle primitive arguments in Object methods (#3342)

ES2015 allows primitive arguments for most of the Object built-ins.
This change implements handling for these arguments in affected methods.

JerryScript-DCO-1.0-Signed-off-by: Dániel Bátyai dbatyai@inf.u-szeged.hu

tests/jerry/object-get-own-property-names.js

@@ -62,11 +62,3 @@ assert (props.indexOf("prop") !== -1);
 assert (props.indexOf("method") !== -1);
 
 assert (props.length === 2);
-
-// Test non-object argument
-try {
-  Object.getOwnPropertyNames("hello");
-  assert (false);
-} catch (e) {
-  assert (e instanceof TypeError);
-}