Disable the MergeFunctions pass in debug builds (#1054)
Disable the MergeFunctions pass in debug builds (#1054)

Reading LLVM IR processed by MergeFunctions can get really tedious.
kulibali/ponyc,sgebbie/ponyc,Theodus/ponyc,dipinhora/ponyc,Praetonus/ponyc,malthe/ponyc,Perelandric/ponyc,kulibali/ponyc,mkfifo/ponyc,mkfifo/ponyc,CausalityLtd/ponyc,cquinn/ponyc,jupvfranco/ponyc,sgebbie/ponyc,jupvfranco/ponyc,mkfifo/ponyc,jemc/ponyc,mkfifo/ponyc,cquinn/ponyc,Theodus/ponyc,CausalityLtd/ponyc,malthe/ponyc,ponylang/ponyc,CausalityLtd/ponyc,sgebbie/ponyc,Perelandric/ponyc,Perelandric/ponyc,cquinn/ponyc,kulibali/ponyc,Praetonus/ponyc,Theodus/ponyc,dipinhora/ponyc,cquinn/ponyc,malthe/ponyc,jupvfranco/ponyc,boemmels/ponyc,Praetonus/ponyc,sgebbie/ponyc,Perelandric/ponyc,jemc/ponyc,boemmels/ponyc,dipinhora/ponyc,Perelandric/ponyc,sgebbie/ponyc,malthe/ponyc,jupvfranco/ponyc,ponylang/ponyc,boemmels/ponyc,ponylang/ponyc,lukecheeseman/ponyta,Praetonus/ponyc,boemmels/ponyc,jupvfranco/ponyc,lukecheeseman/ponyta,lukecheeseman/ponyta,kulibali/ponyc,jemc/ponyc,Theodus/ponyc,mkfifo/ponyc,Theodus/ponyc,boemmels/ponyc