THRIFT-3337 Add testBool method to cross tests

This closes #611
diff --git a/test/cpp/src/TestServer.cpp b/test/cpp/src/TestServer.cpp
index 7b3c04b..e5bc31e 100644
--- a/test/cpp/src/TestServer.cpp
+++ b/test/cpp/src/TestServer.cpp
@@ -78,6 +78,11 @@
     out = thing;
   }
 
+  bool testBool(const bool thing) {
+    printf("testBool(%s)\n", thing ? "true" : "false");
+    return thing;
+  }
+
   int8_t testByte(const int8_t thing) {
     printf("testByte(%d)\n", (int)thing);
     return thing;
@@ -398,6 +403,11 @@
     cob(res);
   }
 
+  virtual void testBool(tcxx::function<void(bool const& _return)> cob, const bool thing) {
+    bool res = _delegate->testBool(thing);
+    cob(res);
+  }
+
   virtual void testByte(tcxx::function<void(int8_t const& _return)> cob, const int8_t thing) {
     int8_t res = _delegate->testByte(thing);
     cob(res);