Fix evaluation order for binary operators (#4114)

Furthermore fix toBoolean for BigInts as well.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com

tests/jerry/es.next/bigint4.js

@@ -13,6 +13,12 @@
  * limitations under the License.
  */
 
+/* Boolean. */
+
+assert(!BigInt("0") === true)
+assert(!BigInt("1") === false)
+assert(!BigInt("-1") === false)
+
 /* Strict equal. */
 
 assert(BigInt("0") === BigInt("0"))