Re-target for ES.Next (#3901)

A list of changes:
- 'es2015-subset' profile is deprecated, and an 'es.next' profile is added.
- The default profile is changed to 'es.next'
- Renamed the JERRY_ES2015 guard to JERRY_ESNEXT
- Renamed JERRY_ES2015_BUILTIN_* guards to JERRY_BUILTIN_*
- Moved es2015 specific tests to a new 'es.next' subdirectory
- Updated docs, targets, and test runners to reflect these changes

Resolves #3737.

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

jerry-core/ecma/operations/ecma-eval.c

@@ -97,9 +97,9 @@ ecma_op_eval_chars_buffer (const lit_utf8_byte_t *code_p, /**< code characters b
   JERRY_CONTEXT (resource_name) = ecma_make_magic_string_value (LIT_MAGIC_STRING_RESOURCE_EVAL);
 #endif /* ENABLED (JERRY_RESOURCE_NAME) */
 
-#if ENABLED (JERRY_ES2015)
+#if ENABLED (JERRY_ESNEXT)
   ECMA_CLEAR_LOCAL_PARSE_OPTS ();
-#endif /* ENABLED (JERRY_ES2015) */
+#endif /* ENABLED (JERRY_ESNEXT) */
 
   ecma_value_t parse_status = parser_parse_script (NULL,
                                                    0,