[erlang-questions] otp_build: default-enable silent-rules

[Tuncer Ayaz]

I'd like to vote for default-enabling silent-rules in OTP's build
system. It's much easier to spot new warnings with silent rules enabled,
and I don't know of a good reason to keep it opt-in.

Are there any arguments to keep it default-disabled?

@Anthony, any particular reason you chose CPP over CXX as the prefix for
compiling C++ sources? Wouldn't CXX be more in line with prefixes like CC?

If there are no objections, I can submit a patch to make both changes.