workarounds for clang-10 warnings

[andrewcorrigan]

Various warnings are triggered using clang-10 with the flag -Wdeprecated-anon-enum-enum-conversion. This PR proposes to suppress those warnings by casting to int

[alliepiper]

Eventually I'd like to sweep through and update the enums to static constexpr variables, but I'm okay with this workaround until then. LGTM.

[andrewcorrigan]

There's another warning that I just started seeing here:

__launch_bounds__ (int((ALT_DIGIT_BITS) ?
    ChainedPolicyT::ActivePolicy::AltUpsweepPolicy::BLOCK_THREADS :
    ChainedPolicyT::ActivePolicy::UpsweepPolicy::BLOCK_THREADS))

that can be suppressed as:

__launch_bounds__ (int((ALT_DIGIT_BITS) ?
    int(ChainedPolicyT::ActivePolicy::AltUpsweepPolicy::BLOCK_THREADS) :
    int(ChainedPolicyT::ActivePolicy::UpsweepPolicy::BLOCK_THREADS)))

Would you want that added to this PR or in a separate one?

[alliepiper]

DVS CL: 29265349

[alliepiper]

Just saw your earlier comment -- let's make that a new PR. This one is close to the finish line.