alter compiler flags

Author: ianfixes

lib/arduino_ci/cpp_library.rb

@@ -190,7 +190,11 @@ def build_for_test_with_configuration(test_file, aux_libraries, ci_gcc_config)
       base = File.basename(test_file)
       executable = File.expand_path("unittest_#{base}.bin")
       File.delete(executable) if File.exist?(executable)
-      args = ["-std=c++11", "-o", executable] + test_args(aux_libraries, ci_gcc_config) + [test_file]
+      args = [
+        ["-std=c++0x", "-o", executable, "-DARDUINO=100"],
+        test_args(aux_libraries, ci_gcc_config),
+        [test_file],
+      ].flatten(1)
       return nil unless run_gcc(*args)
       artifacts << executable
       executable