THRIFT-2779: Always write unescaped JSON unicode string.
Client: PHP
Patch: Phongphan Phuttha

This closes #666
diff --git a/lib/php/test/Test/Thrift/Fixtures.php b/lib/php/test/Test/Thrift/Fixtures.php
index d9d487f..2c60a08 100644
--- a/lib/php/test/Test/Thrift/Fixtures.php
+++ b/lib/php/test/Test/Thrift/Fixtures.php
@@ -46,6 +46,9 @@
     self::$testArgs['testString3'] =
       "string that ends in double-backslash \\\\";
 
+    self::$testArgs['testUnicodeStringWithNonBMP'] =
+      "สวัสดี/𝒯";
+
     self::$testArgs['testDouble'] = 3.1415926535898;
 
 	// TODO: add testBinary() call