Improve support for binding pattern

Including improvements for parameters, variable assignment and
catch parameter.

test/compress/try-catch.js

@@ -0,0 +1,9 @@
+catch_destructuring_with_sequence: {
+    input: {
+        try {
+            throw {};
+        } catch ({xCover = (0, function() {})} ) {
+        }
+    }
+    expect_exact: "try{throw{}}catch({xCover=(0,function(){})}){}"
+}