Update typechecking of || expressions to match the latest spec.
Update typechecking of || expressions to match the latest spec.

hippich/typescript,fdecampredon/jsx-typescript-old-version,popravich/typescript,hippich/typescript,mbebenita/shumway.ts,mbebenita/shumway.ts,mbebenita/shumway.ts,popravich/typescript,popravich/typescript,hippich/typescript,fdecampredon/jsx-typescript-old-version,fdecampredon/jsx-typescript-old-version