Fix ARCMD spec for Linux and MacOS

build_tests/library/override_arcmd.rb

@@ -1,4 +1,4 @@
 env(echo: :command) do |env|
-  env["ARCMD"] = %w[ar rcsu ${_TARGET} ${_SOURCES}]
+  env["ARCMD"] = %w[ar rc ${_TARGET} ${_SOURCES}]
   env.Library("lib.a", glob("*.c"))
 end