Always increase the timeout for MRI tests, even if given as an argument

Author: eregon

test/mri/tests/lib/envutil.rb

@@ -46,11 +46,14 @@ def rubybin
   DEFAULT_SIGNALS.delete("TERM") if /mswin|mingw/ =~ RUBY_PLATFORM
 
   def invoke_ruby(args, stdin_data = "", capture_stdout = false, capture_stderr = false,
-                  encoding: nil, timeout: 15, reprieve: 1, timeout_error: Timeout::Error,
+                  encoding: nil, timeout: 10, reprieve: 1, timeout_error: Timeout::Error,
                   stdout_filter: nil, stderr_filter: nil,
                   signal: :TERM,
                   rubybin: EnvUtil.rubybin,
                   **opt)
+    # TruffleRuby: increase timeout
+    timeout = timeout * 2
+
     in_c, in_p = IO.pipe
     out_p, out_c = IO.pipe if capture_stdout
     err_p, err_c = IO.pipe if capture_stderr && capture_stderr != :merge_to_stdout