Fix --enable-unregistered by passing NOSMP to .hc compiler (#8748)
Fix --enable-unregistered by passing NOSMP to .hc compiler (#8748)

Signed-off-by: Austin Seipp <7ea35d812706d9213868749011af1ed4fa2f6aa0@well-typed.com>
(cherry picked from commit 68f0a6a6cd5bf3374fbc4a4fb09df4cbda97b61c)

lukexi/ghc-7.8-arm64,lukexi/ghc-7.8-arm64,lukexi/ghc-7.8-arm64,lukexi/ghc-7.8-arm64,hferreiro/replay,hferreiro/replay,hferreiro/replay,hferreiro/replay,hferreiro/replay,lukexi/ghc-7.8-arm64,hferreiro/replay,hferreiro/replay