Merge pull request #10669 from ethereum/testRecursionModifiers

Test for recursion with modifiers.

test/libsolidity/semanticTests/modifiers/modifer_recursive.sol

@@ -0,0 +1,17 @@
+contract C {
+    uint public called;
+    modifier mod1 {
+        called++;
+        _;
+    }
+    function f(uint x) public mod1 returns (uint256 r) {
+        return x == 0 ? 2 : f(x - 1)**2;
+    }
+}
+
+// ====
+// compileViaYul: also
+// ----
+// called() -> 0x00
+// f(uint256): 5 -> 0x0100000000
+// called() -> 6