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-module.h

@@ -16,7 +16,7 @@
 #ifndef ECMA_MODULE_H
 #define ECMA_MODULE_H
 
-#if ENABLED (JERRY_ES2015_MODULE_SYSTEM)
+#if ENABLED (JERRY_MODULE_SYSTEM)
 
 #include "common.h"
 #include "ecma-globals.h"
@@ -139,6 +139,6 @@ ecma_value_t ecma_module_check_indirect_exports (void);
 
 void ecma_module_release_module_nodes (ecma_module_node_t *module_node_p);
 void ecma_module_cleanup (void);
-#endif /* ENABLED (JERRY_ES2015_MODULE_SYSTEM) */
+#endif /* ENABLED (JERRY_MODULE_SYSTEM) */
 
 #endif /* !ECMA_MODULE_H */