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-arraybuffer-object.c

@@ -24,7 +24,7 @@
 #include "ecma-helpers.h"
 #include "jmem.h"
 
-#if ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
+#if ENABLED (JERRY_BUILTIN_TYPEDARRAY)
 
 /** \addtogroup ecma ECMA
  * @{
@@ -280,4 +280,4 @@ ecma_arraybuffer_detach (ecma_object_t *object_p) /**< pointer to the ArrayBuffe
  * @}
  * @}
  */
-#endif /* ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
+#endif /* ENABLED (JERRY_BUILTIN_TYPEDARRAY) */