@setEvalBranchQuota ineffectual in simple case

[andrewrk]

test "aoeu" {
    @setEvalBranchQuota(1001);
    bar(1001);
}

fn bar(comptime n: usize) void {
    comptime var i = 0;
    inline while (i < n) : (i += 1) {}
}

/home/andy/downloads/zig/build/test.zig:8:12: error: evaluation exceeded 1000 backwards branches
    inline while (i < n) : (i += 1) {}
           ^
/home/andy/downloads/zig/build/test.zig:3:8: note: called from here
    bar(1001);
       ^

It's important that this works, because bar could be a third party API, for example std.fmt.format.