Update windows test path for Ninja

Author: janisozaur

backtrace/test/test_windows.rb

@@ -4,7 +4,12 @@
 
 class TestLinux < Minitest::Test
     def test_crashpad_uploads
-        result = Crashpad::perform_test executable: 'examples/windows/demo/Debug/demo_windows.exe'
+        if (File.file?('examples/windows/demo/Debug/demo_windows.exe'))
+            tests_path = 'examples/windows/demo/Debug/demo_windows.exe')
+        else
+            tests_path = 'examples/windows/demo/demo_windows.exe')
+        end
+        result = Crashpad::perform_test executable: tests_path
         assert result
         assert result.has_key? :upload