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/regexp-construct.js

@@ -128,3 +128,47 @@ assert (r.multiline == false);
 
 /* RegExp properties */
 assert (RegExp.length === 2);
+
+var r = RegExp ("a","gim");
+var r2 = RegExp (r,"gim");
+var r3 = RegExp (r);
+
+assert(r2.source === 'a');
+assert(r2.global === true);
+assert(r2.ignoreCase === true);
+assert(r2.multiline === true);
+
+assert(r3.source === 'a');
+assert(r3.global === true);
+assert(r3.ignoreCase === true);
+assert(r3.multiline === true);
+
+var obj = { get source() { throw 5 }, [Symbol.match] : true }
+
+try {
+  new RegExp (obj);
+  assert(false)
+} catch (e) {
+  assert(e === 5);
+}
+
+r = new RegExp ("a","gimuy");
+assert (r.global === true);
+assert (r.ignoreCase === true);
+assert (r.multiline === true);
+assert (r.unicode === true);
+assert (r.sticky === true);
+
+try {
+  new RegExp ("a", "uu");
+  assert (false);
+} catch (e) {
+  assert (e instanceof SyntaxError);
+}
+
+try {
+  new RegExp ("a", "yy");
+  assert (false);
+} catch (e) {
+  assert (e instanceof SyntaxError);
+}