THRIFT-3337 Add testBool method to cross tests

This closes #611
diff --git a/test/ThriftTest.thrift b/test/ThriftTest.thrift
index 467968a..a749566 100644
--- a/test/ThriftTest.thrift
+++ b/test/ThriftTest.thrift
@@ -144,6 +144,13 @@
   string       testString(1: string thing),
 
   /**
+   * Prints 'testBool("%s")' where '%s' with thing as 'true' or 'false'
+   * @param bool  thing - the bool data to print
+   * @return bool  - returns the bool 'thing'
+   */
+  bool         testBool(1: bool thing),
+
+  /**
    * Prints 'testByte("%d")' with thing as '%d'
    * @param byte thing - the byte to print
    * @return byte - returns the byte 'thing'