[CSL-889] Build explorer's modules even w/o with-explorer flag
[CSL-889] Build explorer's modules even w/o with-explorer flag

It makes it harder to break explorer.

input-output-hk/pos-haskell-prototype,input-output-hk/pos-haskell-prototype,input-output-hk/cardano-sl,input-output-hk/cardano-sl,input-output-hk/cardano-sl,input-output-hk/pos-haskell-prototype,input-output-hk/cardano-sl