THRIFT-3337 Add testBool method to cross tests

This closes #611
diff --git a/test/cpp/src/TestClient.cpp b/test/cpp/src/TestClient.cpp
index fa5b635..1c0254b 100644
--- a/test/cpp/src/TestClient.cpp
+++ b/test/cpp/src/TestClient.cpp
@@ -307,6 +307,21 @@
       failCount++;
 
     /**
+     * BOOL TEST
+     */
+    printf("testBool(true)");
+    bool bl = testClient.testBool(true);
+    printf(" = %s\n", bl ? "true" : "false");
+    if (bl != true)
+      failCount++;
+
+    printf("testBool(false)");
+    bl = testClient.testBool(false);
+    printf(" = %s\n", bl ? "true" : "false");
+    if (bl != false)
+      failCount++;
+
+    /**
      * BYTE TEST
      */
     printf("testByte(1)");