Provide bless_tests.patch for failing tests

Author: cmb69

appveyor/test_task.bat

@@ -118,4 +118,11 @@ set EXIT_CODE=%errorlevel%
 
 appveyor PushArtifact %TEST_PHP_JUNIT%
 
+if %EXIT_CODE% GEQ 1 (
+	git checkout .
+	nmake run ARGS="scripts\dev\bless_tests.php ."
+	git diff > bless_tests.patch
+	appveyor PushArtifact bless_tests.patch
+)
+
 exit /b %EXIT_CODE%