[SMTChecker] Added support for public getters through this.

test/libsolidity/smtCheckerTests/functions/getters/array_2.sol

@@ -0,0 +1,13 @@
+pragma experimental SMTChecker;
+
+contract C {
+	uint[][] public a;
+
+	function f() public view {
+		uint y = this.a(2,3);
+		assert(y == a[2][3]); // should hold
+		assert(y == 1); // should fail
+	}
+}
+// ----
+// Warning 6328: (160-174): CHC: Assertion violation happens here.