build: Add IBM i compile/link flags
build: Add IBM i compile/link flags

bradking/ninja,Qix-/ninja,iwadon/ninja,maruel/ninja,Qix-/ninja,iwadon/ninja,AoD314/ninja,ninja-build/ninja,ninja-build/ninja,maruel/ninja,sgraham/ninja,AoD314/ninja,maruel/ninja,sgraham/ninja,AoD314/ninja,AoD314/ninja,bradking/ninja,bradking/ninja,maruel/ninja,iwadon/ninja,bradking/ninja,sgraham/ninja,Qix-/ninja,ninja-build/ninja,ninja-build/ninja,iwadon/ninja,sgraham/ninja,Qix-/ninja