Add option to remove static from globals #148
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For various experiments, it's useful to investigate how compilers treat each function separately, but Csmith defaults to marking all functions
staticwhich inhibits this.As it happens, there is a long-lived setting within Csmith to decide whether globals should be forced as static, but it's currently always enabled with no CLI option to disable it.
This adds an advanced option to disable forced globals and documents the option in the help text.