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/base/ecma-init-finalize.c

@@ -56,14 +56,14 @@ ecma_init (void)
   JERRY_CONTEXT (stack_base) = (uintptr_t) &sp;
 #endif /* (JERRY_STACK_LIMIT != 0) */
 
-#if ENABLED (JERRY_ES2015_BUILTIN_PROMISE)
+#if ENABLED (JERRY_BUILTIN_PROMISE)
   ecma_job_queue_init ();
-#endif /* ENABLED (JERRY_ES2015_BUILTIN_PROMISE) */
+#endif /* ENABLED (JERRY_BUILTIN_PROMISE) */
 
-#if ENABLED (JERRY_ES2015)
+#if ENABLED (JERRY_ESNEXT)
   JERRY_CONTEXT (current_new_target) = NULL;
   JERRY_CONTEXT (current_function_obj_p) = NULL;
-#endif /* ENABLED (JERRY_ES2015) */
+#endif /* ENABLED (JERRY_ESNEXT) */
 } /* ecma_init */
 
 /**
@@ -72,10 +72,10 @@ ecma_init (void)
 void
 ecma_finalize (void)
 {
-#if ENABLED (JERRY_ES2015)
+#if ENABLED (JERRY_ESNEXT)
   JERRY_ASSERT (JERRY_CONTEXT (current_new_target) == NULL);
   JERRY_ASSERT (JERRY_CONTEXT (current_function_obj_p) == NULL);
-#endif /* ENABLED (JERRY_ES2015) */
+#endif /* ENABLED (JERRY_ESNEXT) */
 
   ecma_finalize_global_environment ();
   uint8_t runs = 0;