[build.sh] Add a --ram flag to speed up builds for RAM-heavy machines
[build.sh] Add a --ram flag to speed up builds for RAM-heavy machines

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