Macro valgrind_println_backtrace_unchecked

macro_rules! valgrind_println_backtrace_unchecked {
    ($($arg:tt)*) => { ... };
}

Available on crate feature client_requests_defs only.

Allow prints to valgrind log with a backtrace ending the formatted string with a newline

See also crate::valgrind_printf_unchecked