Remove ES_NEXT macro (#4915)

- remove all '#JERRY_ESNEXT' macro
- remove 5.1 build profile, update test runner accordingly (Note: all builtins are turn on by default)
- move tests from tests/jerry/esnext into tests/jerry, concatenate files with same names
- add skiplist to some snapshot tests that were supported only in 5.1
- fix doxygen issues that were hidden before (bc. of es.next macro)

Co-authored-by: Martin Negyokru negyokru@inf.u-szeged.hu
JerryScript-DCO-1.0-Signed-off-by: Adam Szilagyi aszilagy@inf.u-szeged.hu

tests/jerry/arithmetic-parse.js

@@ -0,0 +1,92 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+function check_syntax_error (txt) {
+  try {
+    eval (txt)
+    assert (false)
+  } catch (e) {
+    assert (e instanceof SyntaxError)
+  }
+}
+
+var a = 21;
+var b = 10;
+var c;
+
+check_syntax_error ("c =  a++b");
+check_syntax_error ("c =  a--b");
+
+check_syntax_error ("c = a +* b");
+check_syntax_error ("c = a -* b");
+check_syntax_error ("c = a +/ b");
+check_syntax_error ("c = a -/ b");
+check_syntax_error ("c = a +% b");
+check_syntax_error ("c = a -% b");
+
+check_syntax_error ("a =* b");
+check_syntax_error ("a =/ b");
+check_syntax_error ("a =% b");
+
+check_syntax_error ("c = a+");
+check_syntax_error ("c = a-");
+
+check_syntax_error("a++\n()");
+check_syntax_error("a--\n.b");
+
+assert((-2 .toString()) === -2);
+
+Number.prototype[0] = 123;
+assert(-2[0] === -123);
+
+function f() {
+  var a = 0;
+  function g() {}
+
+  try {
+    eval ("g(this, 'a' = 1)");
+    assert (false);
+  } catch (e) {
+    assert (e instanceof SyntaxError);
+  }
+
+  try {
+    eval ("g(this, 'a' += 1)");
+    assert (false);
+  } catch (e) {
+    assert (e instanceof SyntaxError);
+  }
+
+  assert (a === 0);
+}
+f();
+
+function g(a, b)
+{
+  assert(b === "undefined");
+}
+g(this, typeof undeclared_var)
+
+function h()
+{
+  var done = false;
+  var o = { a: function () { done = (this === o) } }
+  function f() {}
+
+  with (o) {
+    f(this, a());
+  }
+  assert(done);
+}
+h();